Sen. John Fetterman (D-Pa.) says support for Israel is his “red line,” warning that he would leave the Democratic Party if it officially embraces an anti-Israel platform.

“That’s my red line: If the Democratic Party becomes officially anti-Israel, that’s when it would force me out.”

Fetterman also reaffirmed his unwavering support for Israel, stating:

“I’m always going to stand proudly with Israel. I think it’s fantastic that they’re killing Hamas leadership and Hezbollah leadership.”

His remarks come just one day after a House vote exposed the growing divide within the Democratic Party over Israel. A failed amendment to eliminate $3.3 billion in U.S. military aid to Israel received the support of 104 House Democrats, a majority of Democrats who voted on the amendment, marking one of the strongest congressional rebukes of U.S. aid to Israel in recent years.

The divide is also playing out on the campaign trail. In Michigan’s Democratic Senate primary, Rep. Haley Stevens has come under fire from opponent Abdul El-Sayed over her pro-Israel voting record, with U.S. support for Israel becoming a central issue in the race.

While Fetterman has not announced plans to leave the Democratic Party, his comments are among his strongest yet, signaling that continued movement away from support for Israel could ultimately push him to become an independent or seek another political path.

If Fetterman were to eventually leave the Democratic Party, it could have significant implications for the balance of power in the closely divided U.S. Senate, where every seat carries outsized importance