Four Republican U.S. senators have urged the Trump administration to release more than $15 billion in stalled or pending security assistance for Taiwan, putting the issue in sharper focus as Chinese President Xi Jinping arrives in Washington for talks with President Donald Trump.
Senators Mitch McConnell of Kentucky, John Cornyn of Texas, Lisa Murkowski of Alaska and Thom Tillis of North Carolina sent a letter to Secretary of State Marco Rubio and Defense Secretary Pete Hegseth expressing concern over several forms of Taiwan-related security assistance.
According to the senatorsâ letter, the State Department has not moved forward with $300 million in Foreign Military Financing that Congress appropriated for Taiwan, while the Defense Department has not obligated another $1 billion. The administration has also held back approval of a separate foreign military sales package valued at about $14 billion.
The combined figures are significant, but they do not represent $15 billion in cash already approved for transfer to Taiwan. They involve different U.S. security-assistance and arms-sales mechanisms, with different approval, obligation and delivery procedures.
The request also comes at a particularly sensitive moment in U.S.-China relations. Xi is in Washington for a three-day visit, with Trump and Xi scheduled to meet on September 24. Taiwan is among the major issues surrounding the summit, alongside trade, technology, rare earths, Iran and artificial intelligence.
The four Republican senators are among the most prominent congressional voices pressing the administration on Taiwan security assistance.
Mitch McConnell, the Kentucky Republican and former Senate majority leader, joined John Cornyn of Texas, Lisa Murkowski of Alaska and Thom Tillis of North Carolina in writing to Rubio and Hegseth.
Their letter questioned why previously authorized or appropriated security assistance had not moved forward and raised concerns about the effect of delaying support for Taiwan while Washington is engaged with Beijing.
The senators specifically pointed to three categories: $300 million in Foreign Military Financing, $1 billion that the Defense Department has not obligated, and a proposed $14 billion foreign military sales package that the administration has not approved.
The senators also referred to Trumpâs previous description of Taiwan as a âvery good negotiating chipâ in discussions involving Xi and the Chinese Communist Party.
Their letter argued that withholding security assistance while seeking diplomatic stability with Beijing could affect perceptions of U.S. commitments in the Indo-Pacific. The State Department and Defense Department had not immediately responded to Reutersâ request for comment on the letter.
The headline figure of more than $15 billion comes from combining several separate elements.
That distinction is important because the three components do not operate in the same way.
The reported total includes:
Together, those figures exceed $15 billion. However, the amount should not be described as $15 billion in military aid that Taiwan is already receiving.
Foreign Military Financing, Pentagon obligations and Foreign Military Sales have different legal and administrative processes.
Congress appropriated at least $300 million in Foreign Military Financing for Taiwan.
Congressional appropriations language provides that the money is to be made available for assistance to Taiwan and directs the Secretary of State, in coordination with the Secretary of Defense, to prioritize delivery of defense articles and services for Taiwan.
Foreign Military Financing, commonly known as FMF, is a mechanism through which the United States can provide grants or loans that enable eligible partners to purchase U.S. defense equipment and services.
The congressional authorization framework for Taiwan has also allowed for substantial FMF assistance and related loan or loan-guarantee authorities. The Congressional Research Service has described FMF as a tool that can provide grant or loan support for the purchase of U.S. arms.
The current dispute concerns the senatorsâ assertion that the State Department has not moved forward with the $300 million appropriated for Taiwan.
The second component is approximately $1 billion that the senators say the Defense Department has not obligated.
An obligation is not the same thing as a delivery.
In U.S. government budgeting, an obligation generally represents a legally binding commitment to spend or provide funds for a specific purpose. Actual delivery of equipment or services can occur later.
Congress has also established other Taiwan-related security cooperation authorities. For example, the fiscal 2026 Defense Department appropriations legislation included $500 million for the Taiwan Security Cooperation Initiative, with funds available for assistance including defense articles, services and military education and training.
The particular $1 billion figure referenced by the senators, however, should be kept separate from other Taiwan-related appropriations unless government documents establish that they are part of the same account.
The largest component is a separate proposed arms package valued at roughly $14 billion.
Reuters reported that the package has been held for months and that Trump previously described it as a âvery good negotiating chipâ following his May meeting with Xi in Beijing.
The key point is that the $14 billion package has not been approved as a completed arms transfer.
Therefore, the headline figure should not be presented as weapons already purchased or delivered to Taiwan.
A foreign military sale can involve congressional notification, executive-branch approval, contracts, production and eventual delivery. These stages can take time, particularly for sophisticated military equipment.
Taiwan has long relied on U.S. defense equipment and security cooperation as part of its efforts to maintain its self-defense capabilities.
The United States and Taiwan do not have formal diplomatic relations, but Washington maintains extensive unofficial relations with Taipei and provides defensive arms under the framework established by U.S. law.
The Taiwan Relations Act is a central part of that framework. Reuters notes that U.S. law commits Washington to supporting Taiwanâs ability to defend itself, even though the United States does not formally recognize Taiwan as a separate diplomatic ally.
Taiwan has also been working to expand its own defense capabilities, including asymmetric capabilities, drones and other systems intended to improve its ability to respond to potential military pressure.
The issue is particularly significant because Taiwan sits in a strategically important position in the Western Pacific and because Beijing considers Taiwan part of China.
Taiwanâs government rejects Beijingâs sovereignty claims and maintains that Taiwanâs future should be determined by its people. Reuters describes Taiwan as a self-governing democracy whose government resists Chinaâs sovereignty claim.
The Republican senatorsâ request comes just as Trump is hosting Xi in Washington.
The White House said Xi and his wife, Peng Liyuan, would visit the White House on September 24 for an official state visit. Trump was scheduled to greet Xi at Joint Base Andrews on September 23, followed by a state arrival ceremony on September 24.
Taiwan is one of the most sensitive issues in the U.S.-China relationship.
Reuters has reported that the Trump-Xi discussions are expected to cover trade, Taiwan, Iran, artificial intelligence and other areas of strategic competition.
The timing makes the Taiwan arms package particularly relevant because Beijing has repeatedly demanded that Washington stop selling weapons to Taiwan.
Reuters reported that Chinese officials were expected to press Trump to halt Taiwan arms sales, citing the 1982 U.S.-China joint communiqué. Beijing views the Taiwan issue as a core sovereignty matter and has consistently opposed U.S. military support for the island.
The four Republican senatorsâ letter therefore places a congressional demand for movement on Taiwan assistance alongside a diplomatic meeting in which Taiwan is expected to be discussed.
That does not establish that the senatorsâ request will determine the outcome of the Trump-Xi meeting. It does, however, demonstrate that Taiwan security assistance remains an active issue within Washington as the two leaders meet.
Trumpâs position on the pending $14 billion arms package has become part of the debate.
After his May meeting with Xi in Beijing, Trump said he was holding the package in abeyance and described it as a âvery good negotiating chip,â according to Reuters.
That statement is specifically cited in the Republican senatorsâ letter.
The senators said they were concerned about characterizing Taiwan as a negotiating asset in discussions with Beijing, particularly while other Taiwan security assistance remains pending.
The administrationâs position is important because the proposed $14 billion package requires executive-branch action before it can move through the normal foreign military sales process.
At the time of the September 23 Republican letter, Reuters reported that the State and Defense departments had not immediately responded to requests for comment about the senatorsâ concerns.
McConnell is the Kentucky Republican and former Senate majority leader who signed the letter calling for action on Taiwan-related security assistance.
His participation is notable because of his long-standing involvement in U.S. policy toward China and the Indo-Pacific.
The current letter focuses on the administrationâs handling of specific Taiwan security funds rather than proposing a new funding amount.
Texas Senator John Cornyn also signed the letter.
The senators collectively questioned delays affecting both previously appropriated assistance and the proposed $14 billion arms package.
Cornynâs involvement places the issue among congressional Republican concerns about how the administration is balancing relations with Beijing and security commitments to Taiwan.
Alaska Senator Lisa Murkowski was the fourth Republican senator to sign the letter.
Unlike McConnell, Cornyn and Tillis, Murkowski is not among the senators scheduled to leave the Senate at the end of 2026. Reuters reported that McConnell, Cornyn and Tillis are leaving the Senate at the end of the year, while Murkowski is remaining.
North Carolina Senator Thom Tillis also signed the letter.
Tillis has previously participated in bipartisan congressional efforts concerning U.S. support for Taiwan. In May 2026, for example, he joined Democratic and Republican senators in introducing a resolution reaffirming U.S. support for Taiwan.
The September letter is narrower, focusing specifically on the stalled assistance and the proposed arms package.
Taiwan has indicated that it will continue coordinating closely with the United States over arms sales.
A Taiwan defense ministry official said on September 23 that Taiwan would maintain close contact with Washington to promote implementation of arms sales according to plan. The statement came shortly before the Trump-Xi meeting in Washington.
The statement is significant because Taiwan is directly affected by the status of U.S. arms transfers, but it does not mean that the pending $14 billion package had been approved.
Taiwanâs government has consistently sought continued U.S. defense cooperation while also increasing its own defense investment.
The issue is therefore broader than a single arms package. It involves Taiwanâs long-term defense planning, U.S. security policy in the Indo-Pacific and the wider relationship between Washington and Beijing.
China strongly opposes U.S. arms sales to Taiwan.
Beijing regards Taiwan as part of China and considers the issue a matter of sovereignty and territorial integrity. Taiwanâs government rejects Beijingâs sovereignty claim.
Reuters reported before Xiâs Washington visit that Chinese officials were expected to press Trump to halt U.S. arms sales to Taiwan, with Beijing pointing to the 1982 U.S.-China joint communiquĂ©.
China has repeatedly called on the United States to stop arms sales to Taiwan.
That position directly conflicts with the U.S. legal and policy framework under which Washington provides Taiwan with defensive capabilities.
The Taiwan arms issue therefore represents one of the areas where the interests of Washington, Taipei and Beijing remain substantially different.
Understanding the terminology is important when discussing the reported $15 billion figure.
FMF is a U.S. government mechanism that can provide grants or loans to eligible partners to purchase U.S. defense equipment and services.
The $300 million referenced by the senators falls into this category.
Foreign Military Sales, or FMS, are government-to-government transactions through which foreign governments can acquire U.S. defense articles and services.
The reported $14 billion Taiwan package is an FMS proposal.
An FMS announcement or notification does not mean all equipment has immediately arrived in the recipient country.
An obligation represents a government commitment to spend or provide funds for a particular purpose.
It is different from the physical delivery of military equipment.
Delivery occurs later in the process when contracted defense articles, services or other assistance are actually provided.
For major weapons systems, production and delivery can take considerable time.
This is why describing the entire $15 billion figure as âmoney already given to Taiwanâ would be inaccurate.
The exact contents and status of the pending $14 billion package should be based on official notifications and reliable reporting.
The broader Taiwan security-assistance debate can involve capabilities such as:
Recent U.S.-Taiwan defense cooperation has also placed increasing attention on asymmetric capabilities and unmanned systems.
Reuters reported in September that U.S. defense technology company Anduril was concerned about the impact of the delay in the proposed $14 billion Taiwan package. The company has supplied Altius drones already used by Taiwanâs military and has worked with Taiwan on additional defense technology.
However, individual weapons should not be attributed to the pending package unless their inclusion has been officially confirmed.
For Washington, Taiwan policy combines legal obligations, regional security considerations and broader U.S.-China relations.
The Taiwan Relations Act provides the legal framework for U.S. relations with Taiwan following Washingtonâs decision in 1979 to establish diplomatic relations with the Peopleâs Republic of China.
The law states that the United States should make defensive articles and services available to Taiwan and maintain the capacity to resist coercion that could threaten Taiwanâs security or social and economic system.
At the same time, U.S. policy does not establish a formal mutual-defense treaty with Taiwan.
The United States has traditionally maintained what is often described as âstrategic ambiguityâ regarding exactly how it would respond to a Chinese attack on Taiwan.
Arms sales therefore form part of a broader policy structure rather than functioning as a standalone military commitment.
Congress also has a role through appropriations, oversight and legislation.
Beijing considers Taiwan a part of Chinaâs territory and opposes military support from the United States.
China argues that U.S. arms sales interfere with what Beijing regards as an internal Chinese matter and undermine its sovereignty claims.
Reuters reported that Beijing has repeatedly demanded an end to U.S. arms sales and was expected to raise the issue directly with Trump during Xiâs Washington visit.
Taiwan takes a different position, maintaining that its future should be determined by its people and rejecting Beijingâs sovereignty claim.
The United States recognizes the Peopleâs Republic of China diplomatically but maintains unofficial relations with Taiwan and continues to provide defensive arms.
These competing positions help explain why relatively specific decisions over military financing and weapons sales can become major diplomatic issues.
Several questions remain unresolved.
First, the reported $15 billion is not a single pot of money. It combines different forms of assistance and a proposed arms-sale package.
Second, the precise timing for action on the $300 million FMF allocation and the $1 billion cited by the senators remains unclear.
Third, the $14 billion arms package has not been approved, meaning its final contents, timing and implementation remain subject to government decisions and the foreign military sales process.
Fourth, the Trump administration had not publicly provided a detailed response to the senatorsâ September 23 letter at the time of Reutersâ report.
Finally, the issue is unfolding alongside direct Trump-Xi diplomacy, making it difficult to separate the security-assistance question from the wider U.S.-China relationship.
The next steps depend on decisions by the Trump administration and the relevant U.S. departments.
For appropriated assistance, the State Department and Defense Department must carry out the required administrative and legal processes.
For Foreign Military Sales, the process can involve formal notifications, approvals, contracting, production and eventual delivery.
Congress can continue to exercise oversight through hearings, letters, appropriations and legislation.
Taiwan, meanwhile, has said it will remain in close contact with Washington over the implementation of arms sales.
The immediate diplomatic backdrop is the Trump-Xi meeting on September 24.
The outcome of that meeting and any subsequent administration statements could provide additional information about the future status of Taiwan-related security assistance. Any such development should be evaluated separately from the existing congressional request and from assistance that has already been legally appropriated.
2026 â Congressional funding: U.S. lawmakers provide at least $300 million in Foreign Military Financing for Taiwan. Congressional appropriations language directs that the funds be made available for Taiwan assistance.
May 2026 â Trump-Xi meeting: Trump holds discussions with Xi in Beijing. Trump later describes the proposed $14 billion Taiwan arms package as a âvery good negotiating chip,â according to Reuters.
September 2026 â Arms package remains on hold: Reuters reports that the proposed $14 billion package has remained delayed for months.
September 23, 2026 â Republican senatorsâ letter: McConnell, Cornyn, Murkowski and Tillis urge the Trump administration to address more than $15 billion in Taiwan-related security assistance.
September 23, 2026 â Taiwan response: A Taiwan defense ministry official says Taipei will continue close contact with Washington regarding implementation of arms sales.
September 24, 2026 â Trump-Xi meeting: Trump and Xi are scheduled to meet at the White House during Xiâs state visit. Taiwan is among the major issues surrounding the talks.
Republican senators Mitch McConnell, John Cornyn, Lisa Murkowski and Thom Tillis have urged the Trump administration to address stalled or pending Taiwan security assistance. Their letter cited $300 million in Foreign Military Financing, $1 billion that the senators said the Defense Department had not obligated and a separate proposed $14 billion arms package.
The four senators are Mitch McConnell of Kentucky, John Cornyn of Texas, Lisa Murkowski of Alaska and Thom Tillis of North Carolina. McConnell is the former Senate majority leader. The four lawmakers sent their letter to Secretary of State Marco Rubio and Defense Secretary Pete Hegseth.
More than $15 billion is involved when the three figures cited by the senators are combined. These include $300 million in Foreign Military Financing, $1 billion in Defense Department assistance that the senators say has not been obligated and a proposed $14 billion foreign military sales package. These are separate mechanisms and should not be treated as one completed transfer.
No. The reported $15 billion-plus figure does not represent a single payment already delivered to Taiwan. It combines different categories of U.S. security assistance and a proposed arms-sale package. The $14 billion package, in particular, has remained on hold, according to Reuters.
The $300 million refers to Foreign Military Financing appropriated for Taiwan. Congressional language says the funds should be made available for Taiwan assistance and that the Secretary of State, coordinating with the Secretary of Defense, should prioritize delivery of defense articles and services for Taiwan.
The $14 billion figure refers to a proposed U.S. foreign military sales package for Taiwan. It is separate from the $300 million FMF allocation. Reuters reported that the package had been held for months and that Trump previously described it as a âvery good negotiating chip.â
China regards Taiwan as part of its territory and opposes U.S. military support for the island. Beijing has repeatedly called for an end to U.S. arms sales. Taiwan rejects Beijingâs sovereignty claim and maintains that its future should be determined by its people.
Taiwan is one of the sensitive issues in the broader U.S.-China relationship. Trump and Xi are meeting in Washington on September 24, with trade, Taiwan, technology, Iran and artificial intelligence among the major issues surrounding their talks. The Republican senatorsâ request comes immediately before the meeting.
Depending on the specific assistance or arms-sale package, Taiwan-related U.S. security cooperation can involve capabilities such as air defense, missiles, drones, ammunition, communications, intelligence systems, logistics and training. Individual systems should only be attributed to the pending $14 billion package when officially confirmed.
The administration would need to carry out the relevant State Department and Defense Department processes for appropriated assistance, while a foreign military sales package would follow its own approval, contracting, production and delivery procedures. Taiwan has said it will maintain close contact with Washington over arms-sale implementation.