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 (R-Mich.) on Tuesday pushed back against President Trump’s claim that “liberal activists” are organizing agitated protests in GOP districts throughout the United States.

“They are our fellow Americans with legitimate concerns. We need to stop acting so fragile. I'm proud to defend liberty and the Constitution,” Amash wrote on Twitter in response to Trump's tweet.

They are our fellow Americans with legitimate concerns. We need to stop acting so fragile. I'm proud to defend liberty and the Constitution. https://t.co/2CcD02mXzl — Justin Amash (@justinamash) February 22, 2017

Trump referred to the protesters as “so-called angry crowds.”

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“The so-called angry crowds in home districts of some Republicans are actually, in numerous cases, planned out by liberal activists. Sad!” Trump tweeted earlier Tuesday.

Republican lawmakers across the country have encountered protesters at town hall-style events in recent weeks, including House Oversight Chairman Jason Chaffetz Jason ChaffetzThe myth of the conservative bestseller Elijah Cummings, Democratic chairman and powerful Trump critic, dies at 68 House Oversight panel demands DeVos turn over personal email records MORE (R-Utah).

Amash has been an outspoken critic of Trump, recently panning the president’s executive order temporarily barring nationals from seven predominantly Muslim countries entering the United States.

He has faced packed town halls in his home state recently with hundreds of constituents, many of whom are anti-Trump.

"I think it is critical that members of Congress hold in-person town halls like this," Amash said at an event about two weeks ago. "There aren't enough of people on either side of the aisle who do it."