Speaker John BoehnerJohn Andrew BoehnerMcCarthy, allies retaliate against Freedom Caucus leader House vote fails to quell storm surrounding Steve King House passes resolution condemning white nationalism MORE’s decision to back President Obama on Syria was a mistake, according to Rep. Justin AmashJustin AmashMcCarthy, allies retaliate against Freedom Caucus leader On The Money: Trump says he won't declare emergency 'so fast' | Shutdown poised to become longest in history | Congress approves back pay for workers | More federal unions sue over shutdown The 7 Republicans who voted against back pay for furloughed workers MORE (R-Mich.).

“If you’re Speaker of the House and you’re going to take a position in support of the war, which is contrary to what the vast majority of Americans believe, it might be nice to call up your GOP conference and say, ‘Hey, this is what we plan to do,’ but we didn’t get any of that,” said Amash, who is a frequent critic of GOP leadership.

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“There’s constantly a vacuum in leadership, and whenever there’s a big issue where the majority of Americans are going one way, we see our leadership going with the president,” he said on the The Laura Ingraham radio show.

The Michigan congressman said he has spent much of the last two weeks meeting with constituents in his district about Syria. More than 95 percent of them are opposed to military action, he said.

Amash also took aim at other Republicans during the interview.

He criticized Sen. John McCainJohn Sidney McCainOvernight Defense: Trump unveils new missile defense plan | Dems express alarm | Shutdown hits Day 27 | Trump cancels Pelosi foreign trip | Senators offer bill to prevent NATO withdrawal Bipartisan senators reintroduce bill to prevent Trump from withdrawing from NATO Mark Kelly considering Senate bid as Arizona Dems circle McSally MORE (R-Ariz.) for saying “Allahu Akbar” is equivalent to a Christian saying “thank God,” calling the assertion “ignorant and offensive.”

“Good people, whether they’re Muslims, Christians or Jews don’t scream ‘thank God’ when they kill people. It’s completely outrageous he’d say such a thing,” Amash said.

Amash was among a group of Republicans who were stripped of committee assignments late last year for rebelling against leadership.