The House Oversight Committee holds the first public hearing on the attempted assassination of former President Donald Trump, as lawmakers question Secret Service Director Kimberly Cheatle on how a lone gunman was able to nearly kill the Republican presidential nominee. (Screenshot of House Oversight Committee video/YouTube)
MIT economist Jonathan Gruber, right, is sworn in prior to testifying before a House Oversight Committee health care hearing in December, 2014. (AP Photo/Molly Riley)
In this Sept. 30, 2014, file photo, House Oversight Committee member Rep. Jason Chaffetz, R-Utah, leads the questioning of then-Secret Service Director Julia Pierson as the committee examines details surrounding a security breach at the White House on Capitol Hill in Washington. The committee's ranking member Rep. Elijah Cummings, D-Mid. is at left. (AP Photo/J. Scott Applewhite) ** FILE **
Secret Service Director Julia Pierson testifies on Capitol Hill in Washington, Tuesday, Sept. 30, 2014, before the House Oversight Committee as it examines details surrounding a security breach at the White House when a man climbed over a fence, sprinted across the north lawn and dash deep into the executive mansion before finally being subdued. (AP Photo/J. Scott Applewhite)
House Oversight Committee Chairman Rep. Darrell Issa, California Republican, is concerned that a new Food and Drug Administration rule that would allow generic drug companies to change warning labels without approval has no health benefits, and was designed to placate special interest groups and could increase lawsuits. (Associated Press)
** FILE ** Rep. Darrell Issa, R-Calif., the chairman of the House Oversight Committee, questions Internal Revenue Service Commissioner John Koskinen as lawmakers continue their probe of whether tea party groups were improperly targeted for increased scrutiny by the IRS, on Capitol Hill in Washington, Monday, June 23, 2014. (AP Photo/J. Scott Applewhite)