Most House Democrats, including all of the current and former top Democratic leaders, signed on to a letter on Thursday to Israeli leaders warning them against unilaterally annexing territory in the West Bank or Gaza.

At a time when Democrats are increasingly divided over the U.S.-Israel relationship and its direction, the letter highlights a strong degree of unanimity within the party against annexation, among both Democrats who largely remain supportive of Israel and those who have become more critical over the war in Gaza. President Donald Trump reportedly told Arab leaders on Tuesday that he would pressure Israel against annexation.

“As long-standing supporters of the U.S.-Israel relationship, Israel’s security, and Israel’s future, we are deeply opposed to proposals for unilateral annexation of territory in the West Bank,” the 178 lawmakers, led by Reps. Brad Schneider (D-IL) and Jamie Raskin (D-MD), said. “Such a move would not only violate international law but undermine decades of bipartisan U.S. policy and threaten the progress of the Abraham Accords, which offer Israel and its neighbors the opportunity to build a more secure, cooperative, and prosperous regional future. Unilateral annexation of the West Bank would plunge the region, already reeling from tens of thousands of deaths in the horrific Gaza war, into further chaos and violence.”

The letter is addressed to Israeli Prime Minister Benjamin Netanyahu, Defense Minister Israel Katz and Foreign Minister Gideon Sa’ar. Included among the signatories are House Minority Leader Hakeem Jeffries (D-NY), Minority Whip Katherine Clark (D-MA) and Democratic Caucus Chair Pete Aguilar (D-CA), as well as former House Speaker Nancy Pelosi (D-CA), former Majority Leader Steny Hoyer (D-MD) and former Democratic Whip Jim Clyburn (D-SC).

The signatories highlighted that leaders from the United Arab Emirates have expressed that West Bank annexation would be a red line for them that would endanger regional normalization and integration with Israel.

“Moves toward annexation would undermine Israel’s progress on normalization, prevent international cooperation to rebuild Gaza after this devastating war, risk instability in Jordan, and even further strain ties with key European partners,” the letter continues.

They added that annexation of territory in Gaza, as discussed by some Israeli ministers, “would not only violate international law but exacerbate humanitarian and diplomatic challenges at a moment when broad international support for Israel is at risk.”

The lawmakers stated that they are “convinced that unilateral steps by either side,” including Israeli annexation of territory in the West Bank or Gaza, would be an impediment to direct negotiations between Israel and the Palestinians toward a two-state solution and make a “just, sustainable peace” harder to attain.

“We respectfully urge your government to refrain from steps toward unilateral annexation and to recommit to a negotiated outcome consistent with U.S. policy and the regional vision embodied in the Abraham Accords,” the letter concludes. “That path best safeguards Israel’s security and democratic ideals, advances regional cooperation against shared threats, and offers Israelis and Palestinians the possibility of living side by side in peace and dignity, freed from perpetual attacks on civilians and the threat of war.”

Schneider, a co-chair of the Congressional Jewish Caucus, has been a leader in the moderate pro-Israel wing of the party, though he has expressed concerns about the humanitarian situation in Gaza and previously warned individually against annexation. The progressive Raskin is a co-sponsor of legislation that would severely restrict many critical arms transfers to Israel.

Signatories to the letter similarly span the spectrum from consistent supporters of Israel to vocal critics.

Other signatories include Senate candidates Reps. Angie Craig (D-MN), Robin Kelly (D-IL), Raja Krishnamoorthi (D-IL) and Chris Pappas (D-NH); No. 4 House Democrat Rep. Ted Lieu (D-CA); Jewish Caucus co-chair Rep. Jerry Nadler (D-NY); and Reps. Greg Meeks (D-NY), Adam Smith (D-WA) and Rosa DeLauro, the ranking members of the Foreign Affairs, Armed Services and Appropriations Committees, respectively.

Some of Israel’s most vocal far-left critics, as well as some of its most ardent centrist defenders, did not sign onto the letter.

Some congressional Republicans, meanwhile, have shown signs of increasing openness to recognizing Israeli sovereignty over the West Bank.