Rep. Justin Amash Justin AmashOn The Trail: How Nancy Pelosi could improbably become president History is on Edward Snowden's side: Now it's time to give him a full pardon Trump says he's considering Snowden pardon MORE (Mich.), an Independent who left the Republican Party last year, said Sunday that President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE's claim that Iranian Gen. Qassem Soleimani was plotting attacks against four U.S. embassies "seems to be totally made up."

"The administration didn’t present evidence to Congress regarding even one embassy," Amash tweeted.

"And they have never presented evidence of imminence—a necessary condition to act without congressional approval—with respect to any of this," he added, referencing Trump administration officials' justification for launching an airstrike that killed Soleimani.

The administration didn’t present evidence to Congress regarding even one embassy. The four embassies claim seems to be totally made up. And they have never presented evidence of imminence—a necessary condition to act without congressional approval—with respect to any of this. https://t.co/Eg0vaCnqFd — Justin Amash (@justinamash) January 12, 2020

Senior administration officials have said that Soleimani posed an imminent threat to American lives but have not offered details on that position. Trump told Fox News on Friday that he believed four embassies, including the U.S. Embassy in Baghdad, was being targeted.

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Amash's statements came just hours after Defense Secretary Mark Esper Mark EsperTop admiral: 'No condition' where US should conduct nuclear test 'at this time' Overnight Defense: Trump hosts Israel, UAE, Bahrain for historic signing l Air Force reveals it secretly built and flew new fighter jet l Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' Oldest living US World War II veteran turns 111 MORE said on CBS's "Face the Nation" that he had not seen any "specific evidence" that supported Trump's claim that Iran was planning attacks on four embassies. Rather, Esper argued that Trump's position was that "there probably and could've been attacks against additional embassies."

"I shared that view. I know other members of the national security team shared that view. That’s why I deployed thousands of American paratroopers to the Middle East to reinforce our embassy in Baghdad and other sites throughout the region,” Esper said, adding that Trump did not cite a “specific piece of evidence.”

Pressed on whether there was specific evidence, Esper said that he did not see any. He added that administration officials "do not expect any further attacks."

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Trump's decision to order a drone strike that killed Soleimani, the leader of Iran's elite Quds Force, has been met with heavy scrutiny from members of Congress. Many lawmakers have denounced the administration over the lack of information provided to them on the attack.

Sens. Tim Kaine Timothy (Tim) Michael KaineBiden promises Democratic senators help in battleground states Second GOP senator to quarantine after exposure to coronavirus The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep MORE (D-Va.) and Mike Lee Michael (Mike) Shumway LeeMcConnell shores up GOP support for coronavirus package McConnell tries to unify GOP Davis: The Hall of Shame for GOP senators who remain silent on Donald Trump MORE (R-Utah) said Sunday that they did not receive any information regarding alleged threats on four U.S. embassies during an intelligence briefing last week.

“I was at the classified briefing because I'm both an Armed Services and Foreign Relations member. That wasn't told to us in the classified briefing, nor was there a suggestion that multiple embassies were threatened,” Kaine said on CBS’s “Face the Nation.”

Lee, who previously labeled the briefing "insulting," added on Sunday that the briefing was "not helpful" for lawmakers.