WASHINGTON, DC - AUGUST 04: Marine sergeant Alexander McCoy joins with other former members of the U.S. military to request that Sen. John McCain (R-AZ) and other Republican leaders withdraw their endorsement of Republican presidential candidate Donald Trump following a press conference on Capitol Hill August 4, 2016 in Washington, DC. Trump has become embroiled in controversy since responding to the family of U.S. Army Capt. Humayun Khan who was killed while serving in the U.S. Army in Iraq in 2004. (Photo by Win McNamee/Getty Images)