Multiple Senate Republicans voiced support for President Donald Trump’s threat that the U.S. would intervene directly should the Iranian regime escalate its crackdown on the protests sweeping Iran — which appears to have already begun.

Trump warned in a post on his Truth Social platform last Friday that if Iran shoots “and violently kills peaceful protesters, which is their custom, the United States of America will come to their rescue. We are locked and loaded and ready to go.”

The president renewed that threat on Thursday on “The Hugh Hewitt Show,” saying, “If they start killing people, which they tend to do during their riots, they have lots of riots. If they do it, we’re going to hit them very hard.” But on Fox News’s “Hannity,” he said that “for the most part” the regime has not engaged in mass killings of protesters.

Asked on Thursday about the possibility of the U.S. helping the Iranian protesters, Vice President JD Vance expressed his support for the protesters but said he’d defer to Trump on what actions they would take. He also said the U.S. remains open to a “real negotiation” with Iran on its nuclear program.

“I’ll let the president speak to what we’re going to do in the future, but we certainly stand with anybody across the world, including the Iranian people, who are advocating for their rights,” he added.

Trump’s threat has been largely well-received by GOP lawmakers, but lawmakers from both parties have expressed support for the protesters generally. 

“To the people of Iran: We stand with you tonight,” Sen. Lindsey Graham (R-SC) told Fox News on Tuesday evening. “We stand for you taking back your country from the ayatollah, a religious Nazi who kills you and terrorizes the world,” he said, referring to Supreme Leader Ali Khamenei “We pray for you. We support you. Donald J. Trump is not Barack Obama. He has your back. … Help is on the way.”

“And to the ayatollah: You need to understand, if you keep killing your people who are demanding a better life, Donald J. Trump is gonna kill you. Change is coming to Iran. It’ll be the biggest change in the history of the Mideast to get rid of this Nazi regime.”

“President Trump has been very clear: If the ayatollah harms the protesters, the consequences would be catastrophically painful,” Sen. Ted Cruz (R-TX) told Jewish Insider. “The regime should understand that the president is deadly serious and will enjoy strong support in Congress.”

Sen. Pete Ricketts (R-NE) told JI that “what the president said … [is] one of the things that we can do to help protect the Iranians who are protesting.”

Sen. John Fetterman (D-PA) told JI that the U.S. should act “in any possible way to support the Iranian protesters” and said he’d back any efforts in Congress to do so. 

“That’s the real truth to power. They started to kill people there. Remember, they are now so desperate. They’re trying to offer people $7 a month. They’re that desperate,” Fetterman said. “How courageous those protesters are — and that’s a testament to the opportunities Israel and our strikes created — they inspire me. These are Iranian protesters. That is real courage and real — being willing to either get killed, beaten, tortured or disappeared, that’s what happens in true autocracies.”

Other senators spoke more broadly about offering U.S. support for the protesters without addressing direct intervention. 

Sen. Richard Blumenthal (D-CT) noted that lawmakers haven’t engaged extensively about ways for Congress to support the protesters since returning from the holiday recess on Monday, but said it was important for them to express their support. “I’m open to any ideas. I think there’s been very little talk [among lawmakers] in specific terms,” Blumenthal told JI.

“We should speak out and support them in spirit,” Blumenthal said. “I don’t know how much we can do, practically speaking. I know the president has talked about some kind of measures if anyone is killed. I don’t know exactly what he has in mind, but we ought to be supporting the freedom fighters and brave protesters in any way we can.”

Sen. James Lankford (R-OK) said that the “biggest thing that we can do is actually have public officials speak out that our problem with Iran is not the people of Iran, it’s the Iranian regime. Our problem is the same problem the people of Iran have.”

“The regime oppresses them, prevents them from actually being [as] successful as they could be. The people of Iran [are] extremely well educated, extremely sharp people [and] could be a lot more prosperous than they are, but they’re trapped behind a regime that’s obsessed with terrorism, and so they’re holding back their entire country so they can fund Hezbollah,” Lankford said. “So people can’t get food, people can’t have a stable currency, because they want to fund terrorism. Until they have an ability to be able to pick new leaders that will actually represent their values, they’re stuck.”

Sen. Adam Schiff (D-CA) said it is “wonderful” to see the protests happening and that the U.S. “should support them diplomatically, technologically and in other ways, so that they can communicate.”

“But I think we should be very hesitant about expressing our willingness to use military force in yet another country for yet another reason,” Schiff added.

Other Democrats have also discouraged the use of U.S. military force in response to the protests.

Sen. Andy Kim (D-NJ) said the U.S. should “continue to show attention” toward Iran, “making sure we’re not just losing track of everything because of Venezuela, and just continuing to show that we want to make sure that the regime doesn’t crack down brutally as they have in the past.”

“I think that that’s an important sign right now, as this is continuing on,” Kim continued.