Benghazi committee's Trey Gowdy and Elijah Cummings argue.

Hillary Clinton is set to appear before the House Select Committee on Benghazi on Thursday for what will be the highest profile moment to date in the GOP-led panel’s 17-month-and-counting investigation into the 2012 attacks on the U.S. consulate in Libya. The Republican leading the panel and his Democratic counterpart, though, aren’t holding their fire until then. Chairman Trey Gowdy and Rep. Elijah Cummings spent the weekend trading their latest allegations of partisanship, each accusing the other of twisting the facts to serve their own political purposes when it comes to Clinton.