James Comey's March 20 testimony on Capitol Hill contradicted some of the president's positions. It was the first time he publicly acknowledged the FBI investigation into possible ties between Trump associates and Russia. J. Scott Applewhite/AP hide caption

toggle caption
J. Scott Applewhite/AP

From left, Sen. Jeff Flake, R-Ariz., Sen. Chuck Schumer, D-NY, Sen. John McCain, R-Ariz., and Sen. Michael Bennett, D-Colo, arrive at a news conference after their tour of the Mexico border with the United States on Wednesday in Nogales, Ariz. The senators are part of the "Gang of Eight," a larger group of legislators collaborating on changes to immigration. Ross D. Franklin/AP hide caption

toggle caption
Ross D. Franklin/AP