At a town hall in Grand Rapids, Michigan, Amash criticized House Republican leadership, including Minority Leader Kevin McCarthy (R-Calif.), whom he called the "so-called leader."

"I read the Mueller report. I'm sure he didn't read it," Amash said of McCarthy. "He resorted to ad hominem attacks; that's the kind of 'leadership' we now have in Congress."

McCarthy has accused Amash of seeking attention with his remarks and told reporters Amash was "out of step with this conference" and "out of step with America."

Amash reaffirmed his position that special counsel Robert Mueller's report outlines impeachable conduct by Trump.

"I'm confident that if you read volume two, you will be appalled at much of the conduct. And I was appalled by it. And that's why I stated what I stated. That's why I came to that conclusion," he said. "We can't let conduct like that go unchecked."