U.S. President Donald Trump, watched by (L-R) Vice President Mike Pence, White House Chief of Staff Reince Priebus, head of the White House Trade Council Peter Navarro and senior advisor Jared Kushner, signs an executive order that places a hiring freeze on non-military federal workers in the Oval Office of the White House in Washington January 23, 2017.   REUTERS/Kevin Lamarque