PHOTO: Dr. Robert Gates, former Secretary of Defense speaks at the Leadership Huntsville/Madison County 25th Anniversary Dinner, Oct. 11, 2012 in Huntsville, Alabama.
PHOTO: White House spokesman Sean Spicer in Washington, Jan. 23, 2017 | Senate Majority Leader Mitch McConnell (R-KY) speaks on July 19, 2016, in Cleveland, Ohio | Robert Gates, former Secretary of Defense speaks on Oct.11, 2012, in Huntsville, Alabama.
PHOTO: Sen. Armed Services Committee Chairman Sen. John McCain, R-Ariz., welcomes Homeland Security Sec-designate John Kelly before the start of his confirmation hearings, Jan. 10, 2017. Sen. Tom Carper and former Defense Secretary Robert Gates look on.
PHOTO: Secretary of Homeland Security nominee retired General John Kelly, with Former Secretary of Defense Robert Gates, left, and Senator Tom Carper at the start of his confirmation hearings, Jan. 10, 2017.
VIDEO: Robert Gates on Trump's Foreign Policy Speech, 2016 Presidential Race
PHOTO: Pictured (L-R) are Dr. Robert Gates, former Secretary of Defense in Huntsville, Ala., Oct. 11, 2012 and Republican presidential candidate Sen. Ted Cruz in Fort Wayne, Ind., April 28, 2016.