PHILADELPHIA, PA - JULY 25:  Delegates hold up signs that read "Trans-Pacific Partnership (TPP)" on the first day of the Democratic National Convention at the Wells Fargo Center, July 25, 2016 in Philadelphia, Pennsylvania. An estimated 50,000 people are expected in Philadelphia, including hundreds of protesters and members of the media. The four-day Democratic National Convention kicked off July 25.  (Photo by Drew Angerer/Getty Images)