Former Democratic Presidential candidate, Sen. Bernie Sanders, I-Vt., said during his speech at the Democratic National Convention that no one was more disappointed than he is over not being the Democratic presidential nominee.

Sen. Elizabeth Warren, D-Mass. throws her arms open as she takes the stage and is greeted by Rep. Joe Kennedy, D-Mass., prior to her speech at the Democratic National Convention in Philadelphia.

First Lady Michelle Obama takes the stage in Philadelphia.

Sen. Al Franken, D-Minn., and comedian Sarah Silverman speak at the Democratic National Convention. Silverman told Bernie Sanders supporters in the crowd they were being ridiculous.

Astrid Silva walks to the stage to speak about immigration.

Georgia delegate Pat Pullar holds up a sign as the DNC gets underway.

Karla Ortiz, 11, left, and mother Francisca Ortiz wave after speaking to attendees at the Democratic National Convention.

Jason Collins waves while speaking alongside his brother Jarron. Jason Collins played as the first openly gay NBA athlete.

A person at the Wisconsin delegation has "silenced" taped over her mouth during the DNC in Philadelphia.

Baltimore Mayor Stephanie Rawlings-Blake raises the gavel as she calls the convention to order during the first day of the Democratic National Convention in Philadelphia on Monday.

Florida Delegate Sanjay Patel wears a jacket in support of former Democratic presidential candidate Bernie Sanders, I-VT, during the first day of the Democratic National Convention.

Rep. Marcia Fudge, D-Ohio, Chair, Democratic National Convention quiets the crowd during before the convention is gaveled in.

A delegate wears a hat with a bobble-head doll of Democratic Presidential candidate Hillary Clinton.

Maine State Rep. Diane Russell speaks during the first day of the Democratic National Convention in Philadelphia.

A man holds a flag on stage during a rehearsal for the singing of the National Anthem before the 2016 Democratic National Convention in Philadelphia on Monday.

Demonstrators make their way to downtown on the Benjamin Franklin Bridge Monday, July 25, 2016, in Philadelphia, during the first day of the Democratic National Convention.

A supporter of Sen. Bernie Sanders, I-Vt., cools off during a march in downtown Philadelphia on Sunday. The Democratic National Convention starts Monday in Philadelphia.