WASHINGTON, DC - AUGUST 04: Former members of the U.S. military carry boxes representing more than 100,000 signatures requesting 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)