Many of the highest-ranking Senate Republicans, along with leading pro-Israel Democrats, expressed support for Israel’s preemptive strikes on Iran, but a number of skeptical lawmakers — mostly Democrats — expressed concern that the strikes could set off a broader war in the region.

Sen. Tom Cotton (R-AR), the chairman of the Senate Intelligence Committee said, minutes after reports of the operation began, “Proud to stand with Israel.” Sen. Lindsey Graham (R-SC) soon followed, saying, “Game on. Pray for Israel.”

Cotton later added that “We back Israel to the hilt, all the way,” adding that if “the ayatollahs harm a single American, that will be the end of the ayatollahs.”

House Speaker Mike Johnson (R-LA), said “Israel IS right—and has a right—to defend itself!”

Sen. Jim Risch (R-ID), the chair of the Senate Foreign Relations Committee said, “We stand with Israel tonight and pray for the safety of its people and the success of this unilateral, defensive action.”

“I am also praying for the brave U.S. service members in the Middle East who keep America safe — Iran would be foolish to attack the United States,” Risch continued.

Senate Majority Leader John Thune (R-SD) emphasized that Iran has been trying for years to wipe out Israel, and that it had just been found in violation of its nonproliferation obligations. He called for efforts toward peace and warned Iran against attacking American troops.

“Today, Israel has determined that it must take decisive action to defend the Israeli people,” Thune said. “The United States Senate stands ready to work with President Trump and with our allies in Israel to restore peace in the region and, first and foremost, to defend the American people from Iranian aggression, especially our troops and civilians serving overseas. Iran should heavily consider the consequences before considering any action against Americans in the region.”

Sen. Rick Scott (R-FL) said, “I ask every American to join me in praying for the safety of U.S. personnel in the Middle East and the safety and success of Israel as it takes action against a leading state sponsor of terrorism and our shared enemy, Iran.” 

Rep. Mike Lawler (R-NY), the chair of the House Foreign Affairs Committee’s Middle East subcommittee, also expressed support for Israel’s preemptive strike.

“Having just visited the region two weeks ago, I support Israel’s decision to preemptively strike Iran and dismantle its nuclear program,” Lawler said. “Iran cannot have nuclear weapons — a position the US and our allies have held for decades. Peace through strength.”

House Majority Leader Steve Scalise (R-LA) said that Iran’s refusal to dismantle its nuclear program is a danger to the U.S. and an existential threat to Israel. “Tonight Israel is taking action to defend itself, and we stand with Israel. Our prayers are with them and all American personnel in the region.”

Rep. Elise Stefanik (R-NY), the administration’s former nominee to be U.S. ambassador to the United Nations, said, “The U.S. stands strongly with our ally and partner Israel.”

“May God Bless Israel & the brave IAF [Israeli Air Force] soldiers as they protect their national security and the world’s safety,” Stefanik said. “I know President Trump’s top priority is protecting the American people, our brave U.S. service members, and our national security by ensuring the full dismantlement of Iran’s nuclear program to ensure they can never develop a nuclear weapon.”

Sen. John Cornyn (R-TX) said, “Israel has an unquestionable right to defend itself” and that he is “proud to stand with Israel.”

Sen. Ted Cruz (R-TX) said that Iran had “given President Trump the middle finger” on demands to dismantle its nuclear capacity. Israel is acting to defend themselves, and we should stand with them.”

Sen. John Fetterman (D-PA) said that he supports the attack and “Our commitment to Israel must be absolute.”

“Keep wiping out Iranian leadership and the nuclear personnel,” Fetterman said. “We must provide whatever is necessary — military, intelligence, weaponry — to fully back Israel in striking Iran.”

Rep. Debbie Wasserman Schultz (D-FL) said: “If Israel’s strikes set back Iran’s nuclear program, we’ll all be safer,” adding that the U.S. must protect U.S. citizens and personnel and “must support Israel’s defense.”

Rep. Ritchie Torres (D-NY) said that “Israel is not the aggressor. It is defending itself against an existential threat that long predates the present preemptive strike. The true aggressor is the Islamic Republic and its empire of terror — an empire stained with the blood of innocent Israelis.”

Rep. Greg Landsman (D-OH), also noting that the International Atomic Energy Agency had just declared Iran to be in violation of its nonproliferation obligations, said that “Israel is justifiably defending itself and its people.”

“Diplomacy has been given every opportunity, but the Iranian regime refuses to give up their nuclear ambitions,” Landsman said. “There will be peace when Iran no longer has a nuclear program, a civil one sure, and their terror armies dismantled.”

Rep. Josh Gottheimer (D-NJ) said, “I fully stand with the people of Israel and support her right to defend herself against Iran’s nuclear and terror programs.”

Rep. Rick Crawford (R-AR), the chair of the House Intelligence Committee, emphasized that the U.S. was not involved in the strikes. He pointed blame toward Iran but also called for steps to wind down the conflict quickly.

“I will say I regret that we have come to this breaking point. However, under no circumstance can Iran get its hands on a nuclear weapon,” Crawford said. “A nuclear Iran would only embolden our adversaries and not only pose an undeniable threat to Israel, but also the United States and our Arab allies.”

“Iran pushed the world to this point through its blatant, relentless destabilizing behavior. Israel and others in the region have every right to take the actions needed to defend themselves,” Crawford continued. “I commend the Trump Administration for its tireless efforts to bring peace and stability to the region. I am hopeful a remedy is reached sooner rather than later to stabilize this situation before the stakes get any higher.”

A number of congressional Democrats — and one notable isolationist House Republican — are expressing concern that the strikes will spark a broader war in the region and several described the strikes as designed to sabotage U.S. nuclear negotiations with Tehran.

Sen. Jack Reed (D-RI), the top Democrat on the Senate Armed Services Committee, condemned the strikes as a “reckless escalation that risks igniting regional violence.” 

“These strikes threaten not only the lives of innocent civilians but the stability of the entire Middle East and the safety of American citizens and forces,” Reed said. “While tensions between Israel and Iran are real and complex, military aggression of this scale is never the answer.”

He called on both Israel and Iran to “show immediate restraint” and the Trump administration to push for “diplomatic de-escalation before this crisis spirals further out of control.”

Rep. Warren Davidson (R-OH), a Republican aligned with the isolationist wing of the party, also appeared to decry the strikes.

“I’m sad to say but some members of Congress and US Senators seem giddy about the prospects of a bigger war,” Davidson said, appending an emoji of a bandaged, frowning face.

House Minority Leader Hakeem Jeffries (D-NY) stopped short of praising or criticizing the Israeli attack, while blaming President Donald Trump for failing to bring peace to the Middle East and calling for de-escalation.

“I’m hopeful that cooler heads will prevail in the Middle East and the situation is de-escalated,” Jeffries said. “We certainly believe that Iran should never be allowed to become nuclear capable. They are an enemy not just to Israel, but to the United States and to the free world. But we also want to see a reduction in hostilities.”

Sen. Andy Kim (D-NJ) said the strikes appear aimed at undermining U.S. negotiations with Iran, which were scheduled to continue this weekend in Oman.

“Iran should know that any targeting of U.S. forces and personnel stationed across the Middle East in retaliation for Israel’s actions would be a grave mistake. I urge the Trump administration to ensure that the protection of our personnel is our top priority,” Kim said. 

“Conflict should always be a last resort, especially when diplomacy is ongoing. This decision by [Israeli Prime Minister Benjamin] Netanyahu to go against American efforts and go alone in strikes puts American and Israeli lives on the line. We should do everything we can to stop this moment from spiraling into a wider conflict and bring parties back to the table to ensure that Iran does not obtain a nuclear weapon.”

Sen. Chris Murphy (D-CT) also described the attack as a sabotage of the nuclear talks and said it shows that world leaders do not respect President Donald Trump. He added in a statement, “we have no obligation to follow Israel into a war we did not ask for and will make us less safe.”

Sen. Elizabeth Warren (D-MA), a progressive Israel critic, said the strikes were “deeply disturbing.”

“I don’t agree often with the Trump administration, but I think here it’s important to say we need more negotiation, we need deescalation,” Warren said. “We need to get to a deal.”

Rep. Greg Casar (D-TX), who chairs the Congressional Progressive Caucus, emphasized that the Trump administration needs congressional approval to bring U.S. troops into “Netanyahu’s war.”

“Netanyahu’s reckless strike risks provoking a wider war and pulling in the United States,” Casar said. “Trump must oppose Netanyahu’s escalation and pursue a diplomatic path to deal with Iran’s nuclear program. “