Foreign policy
In 2015, The Patriot-News described Fetterman as a non-interventionist. Fetterman has said that the U.S. should not "be considered the world's police officers".
When asked what the greatest foreign threat to the U.S. is, Fetterman responded, "I believe China is not our friend." He has also said that the Chinese government should not be allowed to own agricultural land in the U.S.
In January 2025, Fetterman said he was open to Trump's proposed United States acquisition of Greenland, and later joked he wanted to be appointed "Pope of Greenland". He said it was a "responsible conversation", including "buying it out" like Alaska or the Louisiana Purchase.
In 2025, Fetterman took a hardline stance on Iran's nuclear program, telling The Washington Free Beacon, "Waste that shit", and calling for its destruction. He argued there is no negotiating with a regime that has destabilized the region for decades and said the U.S. has "an incredible window... to strike and destroy Iran's nuclear facilities." Fetterman added, "The negotiations should be comprised of 30,000-pound bombs and the IDF", and later tweeted that Iran's nuclear program's only purpose is to create weapons, urging full U.S. military support in assisting Israel to eliminate it.
Fetterman strongly supports U.S. intervention in the 2026 Iran war. He was the only Democratic senator to join all Republican senators, except Rand Paul, in voting against four separate resolutions offered in March and April 2026 aiming to reassert congressional authority over authorizing the use of military force, saying he was "baffled why so many are unwilling to support the only action to achieve" regime change in Iran. In response to Israeli threats to target the successors of the slain Supreme Leader Ali Khamenei, Fetterman recommended that the U.S. and Israel "just keep killing them until they're gone". He has said, "Every single thing Iran done and is is [sic] a war crime." Fetterman was the only Democratic senator to decline to sign a letter to Defense Secretary Hegseth calling for an investigation into the 2026 Minab school attack. On May 13, 2026, he was the only Senate Democrat to vote against a War Powers Resolution to curtail President Trump's war powers; the vote ended 49-50, blocking it for the seventh time since the start of the conflict.
On May 19, the Senate, with 50 votes in favor and 47 in opposition, advanced a war powers resolution that effectively forces the president to end the war against Iran unless Congress authorizes its continuation. With four Republicans crossing party lines to vote in favor of the resolution, Fetterman was again the sole Democrat to vote against it.
Fetterman strongly supports Israel, its policies, and its relationship with the U.S. During his campaign, he said that as a U.S. senator he would "lean in" on the "relationship between the United States and Israel", adding that the U.S.–Israel relationship "is a special one that needs to be safeguarded, protected, supported and nurtured through legislation and all available diplomatic efforts in the region". He supports United States military aid to Israel, including Iron Dome funding. Fetterman criticized congressional Democrats who voted against Iron Dome funding, calling them "fringe" and "extreme". He has said he supports "Israel's right to defend itself" and is "passionate" in his opposition to the Boycott, Divestment and Sanctions movement. He supported an anti-BDS law signed by Pennsylvania governor Tom Wolf that barred Pennsylvania from entering into contracts with companies that boycott Israel. He was initially in support of a two-state solution and the expansion of the Abraham Accords, the Arab-Israeli set of agreements brokered during the first Trump administration. By 2025, Fetterman opposed a two-state solution, saying in a meeting with J Street President Jeremy Ben-Ami "You can't reform a carton of sour milk" in reference to the Palestinians, and that he had never met an Arab person who would condemn Hamas. Notes from the meeting read: "Correction, only a single Arab he has met with that staff was present for wouldn't outright condemn Hamas."
During the Gaza war, Fetterman steadfastly supported Israeli actions, placing blame for the conflict exclusively on Hamas. He has notably broken from Democrats with his ardent support for Israel in the Gaza war. Commentators have said that his views on Israel have shifted to the right since the conflict's inception and become more in line with those of Republicans. When confronted by pro-Palestine protesters outside the U.S. Capitol, he waved an Israeli flag. In a separate incident, Fetterman told a pro-Palestine activist she should "be protesting Hamas" instead of Israel. He has blamed TikTok for creating "warped" perceptions of the conflict and for widening divisions. When President Biden threatened to withhold some arms supplies to Israel, Fetterman called the threat "deeply disappointing". In June 2024, Fetterman visited Israel and met with President Isaac Herzog and Prime Minister Benjamin Netanyahu. Netanyahu said "Israel has had no better friend" than Fetterman. Netanyahu gave Fetterman a silver-plated beeper to commemorate the killing of Hezbollah members by Israel by exploding their pagers.Fetterman has supported Netanyahu's position against any permanent ceasefire that allows Hamas to remain functional. On March 26, 2024, Fetterman and Representative Josh Gottheimer denounced the Biden administration for not voting against United Nations Security Council Resolution 2728, which "demands an immediate ceasefire for the month of Ramadan respected by all parties leading to a permanent sustainable ceasefire, and also demands the immediate and unconditional release of all hostages". New York magazine reported that Fetterman opposed a ceasefire, saying, "let's get back to killing". He also said Israel should "kill them all". Fetterman's office told New York that these statements were about Hamas, not Palestinian civilians.
Fetterman called South Africa's genocide case against Israel "appalling" and said South Africa "ought to sit this one out". In January 2025, he was the only Democratic senator to vote with all Republicans for cloture on a bill to sanction the International Criminal Court in response to its warrants against Netanyahu and Israeli defense minister Yoav Gallant. In February 2025, Fetterman said he would "fully support" sending U.S. troops in Gaza after President Trump made his Gaza Strip ownership proposal. He called the proposal "provocative" but did not dismiss it, saying it was now "part of the conversation." In April, he was the only Democratic senator to join all Republicans in voting to confirm Mike Huckabee as ambassador to Israel.
In September 2025, Fetterman met with Israeli Ambassador to the United States Yechiel Leiter to discuss a potential resolution forcing every senator to take a position on whether the war in Gaza is a genocide. Leiter suggested that Fetterman instead write an opinion piece explaining his support for Israel. Fetterman said he would include talking points suggested by the Israeli Embassy in the piece. The Israeli Embassy forwarded suggestions for the article to Fetterman's office, but Fetterman's staffers did not tell him so, fearing Fetterman might violate the Foreign Agents Registration Act.
In December 2025, Fetterman wrote Israeli President Herzog a letter calling on him to pardon Netanyahu, who was on trial for corruption. Fetterman said the trial undermined Israel's security amid the Gaza War: "It seems that the legal proceedings against the Prime Minister, dragging on year after year, have become a drain on the nation's spirit and its focus. In a world this dangerous, I question whether any democracy can afford to have its head of government spending valuable hours, day after day, in a courtroom rather than the situation room".
In April 2026, Fetterman was one of seven Democratic senators to join all Republicans in opposing a pair of resolutions that would have blocked sales of bulldozers and 1,000-pound bombs to Israel. In May 2026, the Intelligencer reported that Fetterman has an informal Israel advisor, Dovi Safier, an American writer and grandson of Zev Wolfson. In advance of the article's publication, Fetterman's chief of staff Cabelle St. John resigned. On August 5, in an interview on the The Weekly Show with Jon Stewart, Fetterman rejected calling the Gaza war a "genocide".
In 2023, Fetterman voted against an amendment to the National Defense Authorization Act that would have clarified that Article 5 of the NATO treaty does not obviate the need for Congress to declare war. Fetterman voted for Tim Kaine's amendment, which prohibits the president of the United States from withdrawing from NATO without congressional approval.
Fetterman supports military aid to Ukraine in the Russo-Ukrainian War. He has said, "If you can't support Ukraine right now, that's un-American and you're not standing up for democracy."
Fetterman was the sole Democratic senator to vote against a war powers resolution to prevent President Trump from launching further strikes on Iran after the June 2025 attacks on Iranian nuclear sites. He was the only Democratic senator to vote with all Republican senators to vote against a war powers resolution to prevent Trump from launching further strikes in the Caribbean after attacks on Venezuelan boats in September 2025.