WASHINGTON – GOP Sen. Mike Lee of Utah emerged from the classified briefing with White House administration officials about the airstrike that killed top Iranian Gen. Qasem Soleimani breaking ranks from many of his Republican colleagues about the meeting, calling it "insulting and demeaning."

Flanked by Sen. Rand Paul, R-Ky., who has been critical since the beginning of the actions toward Iran last week, Lee called the 75-minute closed-door meeting "the worst briefing I've seen, at least on a military issue.”

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Administration officials, including Defense Secretary Mark Esper, Secretary of State Mike Pompeo, Joint Chiefs of Staff Chairman Mark Milley and CIA Director Gina Haspel, met with House members and senators in a secure location Wednesday on Capitol Hill just one day after Iran fired missiles at U.S. troops and coalition forces being housed at two bases in Iraq. The briefing was to provide evidence that the strike on Soleimani was justified and that he posed an imminent threat to American lives.

“What I found so distressing about that briefing was that one of the messages we received from the briefers was: 'Do not debate. Do not discuss the issue of the appropriateness of further military intervention against Iran. And then if you do, you'll be emboldening Iran,'” Lee said in front of news cameras after the briefing.

"I find this insulting and demeaning to the office that each of the 100 senators in this building happens to hold. I find it insulting and demeaning to the Constitution of the United States," Lee said.

He continued: "They had to leave after 75 minutes while they’re in the process of telling us that we need to be good little boys and girls and run along and not debate this in public.”

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Lee told reporters he entered the meeting unsure of whether he would support a war powers resolution that had been introduced by Virginia Democratic Sen. Tim Kaine that would require President Donald Trump to seek congressional approval before expanding the conflict with Iran.

“I walked into the briefing undecided. I walked out of the briefing decided,” Lee declared. He called the officials' comments “un-American” and “unconstitutional.”

“What we were told, over and over again, was, 'Look, this action was necessary, this was a bad guy, we had to do it,'” Lee said. “I’d hoped and expected to receive more information outlining the legal, factual and moral justification for the attack.”

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“They struggled to identify anything” that would require congressional authorization, Lee said.

The briefing comes on the same day House Speaker Nancy Pelosi, D Calif., announced the House would vote Thursday on a similar measure that would limit Trump's ability to wage war with Iran.