In the wake of the “massive” strikes on Iran by the U.S. and Israel Saturday, members of Congress have begun weighing in on the situation — with Democrats demanding answers.

Republicans have so far praised President Donald Trump’s decision to undertake “massive combat operations” against Iran, with an eye towards liberating the Iranian people.

Sen. Lindsey Graham, R-S.C., one of Trump’s most ardent supporters, said in a post on X “the end of the largest state sponsor of terrorism is upon us” and celebrated “freedom” for the Iranian people.

“My mind is racing with the thought that the murderous ayatollah’s regime in Iran will soon be no more,” he said in another post. “The biggest change in the Middle East in a thousand years is upon us.”

Secretary of State Marco Rubio reached out to some members of the so-called Gang of 8 to notify them of the operation in Iran before it was underway, multiple congressional offices confirmed to ABC News.

Members of the Gang of 8 include the top bipartisan House and Senate leaders and the chairs and ranking members of the House and Senate intelligence committees.

On Tuesday of this week, hours ahead of the president’s State of the Union address, Rubio and CIA Director John Ratcliffe virtually briefed the Gang of 8 on Capitol Hill on Iran.

Immediately following the briefing, Senate minority leader Chuck Schumer told reporters: “This is serious, and the administration has to make its case to the American people.”

House Intelligence Committee Chairman Rick Crawford, an Arkansas Republican briefed ahead of the strikes in Iran, issued a statement providing a sense of why the president moved forward with the operation. 

“Prior to the initiation of this action, in earnest diplomatic engagements with Iran, President Trump was very clear about his red line from the start and his expectations of Iran during these negotiations. Iran absolutely cannot be allowed to maintain a nuclear weapon or capabilities,” he said in a statement posted on X. “The safety and security of Americans and our allies are on the line.”

As strikes were underway on Saturday, Rep. Nancy Mace, R-S.C., said that after the “Iranian regime has slaughtered thousands of its own people in recent days,” the attack on Iran should be a warning to despotic regimes.

“Tyrants and terrorists everywhere should take note: the world is watching. History is watching,” Mace wrote on X.

Notably Sen. John Fetterman, D.-Pa., said he believed Trump was making the right move.

“President Trump has been willing to do what’s right and necessary to produce real peace in the region. God bless the United States, our great military, and Israel,” Fetterman wrote in an X post.

But other Democrats demanded an explanation for the strikes, like Sen. Ruben Gallego, D-Ariz., a veteran, who lamented the action.

“I lost friends in Iraq to an illegal war. Young working-class kids should not pay the ultimate price for regime change and a war that hasn’t been explained or justified to the American people,” he wrote on X.

Others called for a full briefing and a vote on a proposed war powers resolution that would limit Trump’s power.Rep. Jared Moskowitz demanded a briefing.

“This is a serious moment that demands full transparency and congressional oversight,” Moskowitz, D-Fla., wrote on X.