Day One at the Democratic National Convention in Philadelphia (40 images)

First Lady Michelle Obama speaks about unity during the Democratic National Convention at Wells Fargo Center in Philadelphia, Pennsylvania, on July 25, 2016. The delegates will confirm the nomination of Hillary Clinton and Tim Kaine as the Democratic ticket for the November election. Photo by Ray Stubblebine/UPI

Sen. Bernie Sanders walks offstage after pledging support for Hillary Clinton during the Democratic National Convention at Wells Fargo Center in Philadelphia, Pennsylvania, on July 25, 2016. The delegates will confirm the nomination of Hillary Clinton and Tim Kaine as the Democratic ticket for the November election. Photo by Ray Stubblebine/UPI

Senator Elizabeth Warren of Massachusetts hugs Representative Joe Kennedy as she makes her way on stage on day one of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania on Monday, July 25, 2016. The four-day convention starts on Monday, July 25th, and is expected to nominate Hillary Clinton for president of the United States. Photo by Pat Benic/UPI

Delegates celebrate during the Democratic National Convention at Wells Fargo Center in Philadelphia, Pennsylvania on July 25, 2016. The delegates will confirm the nomination of Hillary Clinton and Tim Kaine as the Democratic ticket for the November election. Photo by Pete Marovich/UPI