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US President Barack Obama acknowledges the crowd on the third day of the Democratic National Convention at the Wells Fargo Center, July 27, 2016 in Philadelphia, Pennsylvania. Democratic presidential candidate Hillary Clinton received the number of votes needed to secure the party's nomination. 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.

US Vice President nominee Tim Kaine acknowledges the crowd prior to delivering remarks on the third day of the Democratic National Convention at the Wells Fargo Center, July 27, 2016 in Philadelphia, Pennsylvania.

Delegates hold up signs as Democratic Nominee for Vice President Tim Kaine speaks during the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, July 27, 2016.

U.S. Sen. Minority Leader Sen. Harry Reid (D-NV) delivers remarks on the third day of the Democratic National Convention at the Wells Fargo Center, July 27, 2016 in Philadelphia, Pennsylvania.

Delegates cheer during Day Three of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, July 27, 2016.

Former Governor of Maryland Martin O'Malley speaks during Day Three of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, July 27, 2016.

A Hillary Clinton supporter looks on during day three of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, July 27, 2016.

Vice-President Joe Biden addresses delegates on Day 3 of the Democratic National Convention at the Wells Fargo Center, July 27, 2016 in Philadelphia.

In this July 27, 2016 photo, U.S. Vice Presient Joe Biden and his wife Dr. Jill Biden acknowledge the audience on Day 3 of the Democratic National Convention at the Wells Fargo Center in Philadelphia.

A man dressed as Jesus Christ dances in protest of a religious group as supporters for former Democratic presidential candidate Bernie Sanders hold a rally during the 2016 Democratic National Convention on July 27, 2016 in Philadelphia, Pennsylvania.

Lenny Kravitz performs during the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, July 27, 2016.

Supporters of former Democratic presidential candidate Bernie Sanders hold up posters at a 'Black Men For Bernie' rally to gain support for third party candidates and protest the DNC during the 2016 Democratic National Convention on July 27, 2016 in Philadelphia, Pennsylvania.

Former New York City Mayor Michael Bloomberg delivers remarks on the third day of the Democratic National Convention at the Wells Fargo Center, July 27, 2016 in Philadelphia, Pennsylvania.

Actress Sigourney Weaver speaks during the third day of the Democratic National Convention in Philadelphia , Wednesday, July 27, 2016.

Former Arizona representative Gabby Giffords and astronaut Mark Kelly join hands after addressing delegates on Day 3 of the Democratic National Convention at the Wells Fargo Center July 27, 2016 in Philadelphia, Pennsylvania.

Former US president Bill Clinton (R) cheers as former New York City mayor Michael Bloomberg addresses the third evening session of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, July 27, 2016.

Delegates cheer US Vice President Joe Biden (lower L) during the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, July 27, 2016. /

Former Secretary of Defense Leon Panetta delivers a speech on the third day of the Democratic National Convention at the Wells Fargo Center, July 27, 2016 in Philadelphia, Pennsylvania. Democratic presidential candidate Hillary Clinton received the number of votes needed to secure the party's nomination. 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.

Children hold banners at a Bernie Sanders event near City Hall on day three of the Democratic National Convention (DNC) on July 27, 2016 in Philadelphia, Pennsylvania. The convention officially began on Monday and has attracted thousands of protesters, members of the media and Democratic delegates to the City of Brotherly Love.

Delegates hold up signs as Democratic Nominee for Vice President Tim Kaine speaks during the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, July 27, 2016.

Former U.S. president Bill Clinton addresses the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania.

Former U.S. President Bill Clinton delivers remarks on the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia. Democratic presidential candidate Hillary Clinton received the number of votes needed to secure the party's nomination.

Former U.S. President Bill Clinton arrives on stage to deliver remarks on the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania.

Former US Secretary of State Madeleine Albright finishes her address on the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania.

16-month Ethan Jennings grabs a cardboard cutout of the face of Democratic Presidential candidate Hillary Clinton as his father Florida delegate Bernard Jennings holds him during the second day session of the Democratic National Convention in Philadelphia, Tuesday, July 26, 2016.

Actor Tony Goldwyn speaks during the second day of the Democratic National Convention in Philadelphia , Tuesday, July 26, 2016.

Former U.S. Attorney General Eric Holder delivers remarks on the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania.

Actresses America Fererra, right, and Lena Dunham deliver remarks on the second day of the Democratic National Convention at the Wells Fargo Center on July 26, 2016 in Philadelphia.

Sen. Chuck Schumer (D-NY) deliovers remarks on the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania.

Interim chair of the Democratic National Committee, Donna Brazile delivers remarks on the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania. Democratic presidential candidate Hillary Clinton received the number of votes needed to secure the party's nomination. 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.

Former Vermont governor Howard Dean address the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania.

9/11 survivor, Lauren Manning, delivers remarks on the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania.

Ryan Moore smiles at the podium as he speaks on the second day of the Democratic National Convention in Philadelphia , Tuesday, July 26, 2016.

Sen. Amy Klobuchar (D-MN) walks on stage to deliver remarks on the second day of the Democratic National Convention at the Wells Fargo Center, July 26, 2016 in Philadelphia, Pennsylvania. Democratic presidential candidate Hillary Clinton received the number of votes needed to secure the party's nomination. 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.

First lady Michelle Obama acknowledges the crowd before delivering remarks on the first day of the Democratic National Convention at the Wells Fargo Center, July 25, 2016 in Philadelphia. 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.

U.S. Senator Bernie Sanders smiles during Day 1 of the Democratic National Convention at the Wells Fargo Center in Philadelphia on July 25, 2016.

Delegates cheer during the first day of the Democratic National Convention in Philadelphia , Monday, July 25, 2016.

Delegates dance as Paul Simon sings during Day 1 of the Democratic National Convention at the Wells Fargo Center in Philadelphia, Pennsylvania, July 25, 2016.

Former Presidential candidate and US Senator Bernie Sanders gestures during Day 1 of the Democratic National Convention at the Wells Fargo Center in Philadelphia on July 25, 2016.

Wellington Webb, former mayor of Denver, speaks during Day 1 of the Democratic National Convention at the Wells Fargo Center in Philadelphia on July 25, 2016.

Rep. Elijah Cummings, D-Maryland, speaks during the first day of the Democratic National Convention in Philadelphia on Monday, July 25, 2016.

A Bernard Sanders supporter glows on the floor on Day 1 of the Democratic National Convention at the Wells Fargo Center in Philadelphia on July 25, 2016.

Signs in opposition to Republican presidential nominee Donald Trump are displayed on the floor of the 2016 Democratic National Convention at Wells Fargo Center on July 25, 2016 in Philadelphia.

Delegates hold up signs during the first day of the Democratic National Convention in Philadelphia on Monday, July 25, 2016.

Leah Daughtry, CEO of the Democratic National Convention Committee, waves to the crowd before delivering a speech 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.

Tape covering the mouth of a delegate from Michigan reads "Silenced By DNC" on the first day of the Democratic National Convention at the Wells Fargo Center on July 25, 2016 in Philadelphia.

Florida delegates dance during the first day of the Democratic National Convention in Philadelphia on Monday, July 25, 2016.

Bernie Sanders supporters gather at FDR park after marching through downtown on the first day of the Democratic National Convention on July 25, 2016 in Philadelphia.

Singer-songwriter Paul Simon performs on stage during the first day of the Democratic National Convention at the Wells Fargo Center on July 25, 2016 in Philadelphia.

Richard Trumka, President of the AFL-CIO, speaks during the first day of the Democratic National Convention in Philadelphia on Monday, July 25, 2016.

An attendee in support of Sen. Bernie Sanders walks the floor on the first day of the Democratic National Convention at the Wells Fargo Center, July 25, 2016 in Philadelphia.

Singer Demi Lovato performs on stage during 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.

Baltimore Mayor Stephanie Rawlings-Blake bangs the gavel calling to order 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.

Astrid Silva walks to the stage to speak about immigration during the first day of the Democratic National Convention in Philadelphia on Monday, July 25, 2016.

Rep. Luis Guti茅rrez (D-Ill) delivers remarks on the first day of the Democratic National Convention at the Wells Fargo Center, July 25, 2016 in Philadelphia.

Sen. Al Franken, D-Minn., gives his thumb up as after speaking to delegates during the first day of the Democratic National Convention in Philadelphia on Monday, July 25, 2016.

U.S. First Lady Michelle Obama addresses delegates on Day 1 of the Democratic National Convention at the Wells Fargo Center in Philadelphia on July 25, 2016.

Sen. Cory Booker (D-NJ) delivers remarks on the first day of the Democratic National Convention at the Wells Fargo Center, July 25, 2016 in Philadelphia.

U.S. Senator Elizabeth Warren speaks during Day 1 of the Democratic National Convention at the Wells Fargo Center in Philadelphia on July 25, 2016.

Former President Bill Clinton applauds First Lady Michelle Obama as Eric Holder and Rep. Elijah Cummings, D-Maryland, take their seats during the first day of the Democratic National Convention in Philadelphia on Monday, July 25, 2016.