Rep. Justin Amash said he thinks President Trump's conduct has crossed the line, suggesting he violated public trust and Congress should exercise its checks and balances authority. President Trump called Mr. Amash a "loser" in response. (Associated Press)
House Speaker John A. Boehner (left), Ohio Republican, administers the House oath to Rep. Justin Amash, Michigan Republican, during a mock swearing-in ceremony on Capitol Hill in Washington on Wednesday, Jan. 5, 2011. (AP Photo/Jacquelyn Martin)