US President Donald Trump (C) waits at his desk before signing confirmations for James Mattis as US Secretary of Defense and John Kelly as US Secretary of Homeland Security, as Vice President Mike Pence (L) and White House Chief of Staff Reince Priebus (R) look on, in the Oval Office of the White House in Washington, DC, January 20, 2017. / AFP / JIM WATSON        (Photo credit should read JIM WATSON/AFP/Getty Images)