US lawmakers offered mixed reactions to Israel’s strikes on Iran overnight on Friday, with responses largely falling along ideological lines: Republicans broadly defended Israel’s right to act unilaterally, while many progressive Democrats expressed concern over the potential for regional escalation and what they viewed as the lack of prior US coordination.

“Today, Israel has determined that it must take decisive action to defend the Israeli people,” Senate Majority Leader John Thune, (R-SD) said on X/Twitter. “The United States Senate stands ready to work with President [Donald] 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.”

Speaker of the House Mike Johnson (R-LA) also defended Israel’s preemptive strikes against Iran, arguing that Tehran’s nuclear ambitions are unacceptable.

“Israel and the United States have been united, including in our shared insistence that Iran must never obtain a nuclear weapon. President Trump and his administration have worked tirelessly to ensure that outcome. Unfortunately, Iran has refused to agree and even declared yesterday its intent to build a new enrichment facility,” Johnson wrote on X/Twitter. 

Sen. Tom Cotton (R-AR), the chairman of the Senate Intelligence Committee added, “We back Israel to the hilt, all the way,” white vowing that if “the ayatollahs harm a single American, that will be the end of the ayatollahs.”

 Sen. Lindsey Graham, one of the foremost supporters of the Jewish state in Congress, wrote on X, “Game on,” adding, “Pray for Israel.”

Sen. Rick Scott (R-FL) said, “I ask every American to join me in praying for the safety of US 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.” 

Meanwhile, while many more centrist, moderate Democrats offered support for Israel, some were much more critical of Israel’s strikes against Iran’s nuclear facilities, urging the White House and Jerusalem to seek a diplomatic resolution. 

Sen. Jack Reed (D-RI), the highest-ranking Democrat on the Senate Armed Services Committee, slammed Israel’s military operations as “reckless.”

“Israel’s alarming decision to launch airstrikes on Iran is a reckless escalation that risks igniting regional violence,” Reed said in a statement. 

Progressive Democrats lambasted Israel for its military operation.

Rep. Rashida Tlaib (D-MI), one of the most anti-Israel voices in Congress, repudiated Israel’s attack on Iranian nuclear sites, warning that Jerusalem could lead the US into a hot war with Tehran.

“The Israeli government bombing Iran is a dangerous escalation that could lead to regional war. War Criminal Netanyahu will do anything to maintain his grip on power. We cannot let him drag our country into a war with Iran. Our government must stop funding and supporting this rogue genocidal regime,” Tlaib wrote, referring to Israeli Prime Minister Benjamin Netanyahu.

Rep. Ilhan Omar (D-MN), another staunch critic of the Jewish state, lambasted Jerusalem’s preemptive actions against Iran, suggesting that Israel behaves with impunity.

“Regardless of what Trump thinks, Israel knows America will do whatever they want and feels confident about their ability to get into war and have the American government back them up. Israel also knows they can always rely on getting America to protect and serve its needs. Everyone in America should prepare themselves to either see their tax dollars being spent on weapon supplies to Israel or be dragged into war with Iran if this escalates,” Omar said.

Democratic Senate leader Chuck Schumer (NY), the highest-ranking Jewish elected official in Congress, was one of the top Democrats not to criticize Israel’s strikes against Iran. 

“I have long said that Israel has a right to defend itself and that Iran cannot have a nuclear weapon,” Schumer said in a statement on Friday. “Ensuring they never obtain one must remain a top national security priority.” 

He added, “The preferred path to preventing a nuclear-armed Iran and for supporting security and stability in the region has always been a strong, unrelenting diplomatic effort backed by meaningful leverage, and every effort must be made to move toward the path of a diplomatic solution.”

Sen. Jacky Rosen (D-NV), a member of the Armed Services Committee, also defended Israel’s decision to strike Iranian nuclear sites.

“Israel acted in self-defense against an attack from Iran, and the US must continue to stand with Israel, as it has for decades, at this dangerous moment,” Rosen wrote. 

In the early hours of Friday morning, Israel launched a large-scale military operation against Iran, named Operation Rising Lion, targeting key nuclear and military sites across the country. The strikes resulted in the deaths of several high-ranking Iranian officials, including Major General Mohammad Bagheri, Major General Hossein Salami, and two prominent nuclear scientists, Fereydoon Abbasi and Mohammad Mehdi Tehranchi. Explosions were reported in Tehran and other provinces, with significant damage to facilities in Natanz, Isfahan, Khondab, and Khorramabad. 

The Israel Defense Forces (IDF) described the operation as a preemptive measure to prevent Iran from advancing its nuclear weapons program. In retaliation, Iran launched over 100 drones at Israel, most of which were intercepted, as well as two barrages of ballistic missiles that reportedly caused about two-dozen injuries. The Trump administration condemned Iran’s actions and reaffirmed its commitment to Israel’s defense, while distancing itself from the Israeli strikes by saying it was not involved in the operation.

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