Sen. Tim Kaine (D-Va.) and Sen. Jeff Flake (R-Ariz.) talk about their introduction of a new Authorization for the Use of Military Force (AUMF) against the Islamic State of Iraq and Syria (ISIS), al-Qaeda and the Taliban during a news conference at the U.S. Capitol May 25, 2017 in Washington, D.C. (Chip Somodevilla/Getty Images)