Democratic presidential nominee Hillary Clinton reaches for President Barack Obama as she steps on stage after his speech on the third day of the Democratic National Convention Wednesday. Scott Applewhite/Associated Press

President Barack Obama waves to the delegates before speaking during the third day of the Democratic National Convention.

Democratic vice presidential candidate Sen. Tim Kaine, D-Va., takes the stage during the third day session of the Democratic National Convention in Philadelphia on Wednesday.

Vice President Joe Biden speaks at the Democratic National Convention in Philadelphia on Wednesday. He blasted Trump for having "no clue" about what makes America great.

Former Rep. Gabby Giffords, D-Ariz., and her husband Astronaut Mark Kelly (ret.), walk off the stage after speaking during the third day of the Democratic National Convention.

Connecticut delegate Audrey Blondin is bedecked in red, white and blue for the third day session of the Democratic National Convention in Philadelphia on Wednesday.

Senate Minority Leader Harry Reid of Nevada is escorted to the podium by his wife, Landra, before speaking during the third day of the Democratic National Convention in Philadelphia on Wednesday.

Former Defense Secretary Leon Panetta speaks during the third day of the Democratic National Convention.

Actress Sigourney Weaver speaks during the third day of the Democratic National Convention.

Felicia Sanders and Polly Sheppard, survivors of the Mother Emanuel Church shooting in Charleston, SC., speak during the third day of the Democratic National Convention.

Christine Leinonen, the mother of Christopher "Drew" Leinonen, who was killed in the nightclub attack in Orlando, is joined on stage by Brandon Wolf and Jose Arraigada, survivors of the attack, as she speaks during the third day of the Democratic National Convention.

The Rev. Jesse Jackson waves from the podium during the third day of the Democratic National Convention in Philadelphia on Wednesday. He said Hillary Clinton can be trusted to fight for issues such as a fair Supreme Court, gun control and progressive policies.

Alabama delegates cheer during the third day session of the Democratic National Convention in Philadelphia on Wednesday.

Emily's List President Stephanie Schriock waves from the podium during the third day of the Democratic National Convention in Philadelphia on Wednesday.

Mayor Bill de Blasio, of New York, waves after speaking during the third day session of the Democratic National Convention in Philadelphia on Wednesday.

Jerry Emmett, 102, of Prescott, Ariz., talks with Sruthi Palaniappan, an 18-year-old Iowa delegate, at the Democratic National Convention in Philadelphia on Wednesday. Emmett was born before women gained the right to vote in America, so it's fitting she announced that the Arizona delegation was casting 51 of its 85 votes for Hillary Clinton for president on Tuesday.

Alabama delegates cheer during the third day session of the Democratic National Convention in Philadelphia on Wednesday.

Congressional Black Caucus Chairman Rep. G. K. Butterfield, D-NC., stands with members of the caucus as he speaks during the third day of the Democratic National Convention in Philadelphia on Wednesday.

Florida delegate Dianne Krumel, of Pensacola, shows her support for Democratic Presidential candidate Hillary Clinton before the start of the third day session of the Democratic National Convention in Philadelphia on Wednesday.

California Gov. Jerry Brown speaks during the third day of the Democratic National Convention in Philadelphia , Wednesday, July 27, 2016. (AP Photo/J. Scott Applewhite)

President Barack Obama and Democratic presidential nominee Hillary Clinton wave to delegates after President Obama's speech during the third day of the Democratic National Convention in Philadelphia on Wednesday.