Bernie Sanders' Presidential Bid in Pictures

Bernie Sanders and Hillary Clinton react as they speak during the CNN Democratic Presidential Primary Debate at the Brooklyn Navy Yard on April 14, New York.

Seth Wenig / AP

Marissa Johnson, speaks as Mara Jacqueline Willaford stands with her and Sanders stands nearby as the two women take over the microphone at a rally on Aug. 8, 2015, in Seattle. The women, co-founders of the Seattle chapter of Black Lives Matter, took over the microphone moments after Sanders began speaking and refused to relinquish it. Sanders eventually left the stage without speaking further and instead waded into the crowd to greet supporters.

Elaine Thompson / AP

Sanders speaks at a rally, Aug. 9, 2015, at the Moda Center in Portland, Ore.

Troy Wayrynen / AP

Sanders supporter shows off his tattoos at a rally at the Presidio on June 6 in San Francisco.

Andrew Burton / Getty Images

Sanders gives the crowd a victorious gesture on stage during a primary night rally in Concord, New Hampshire on Feb. 9 after winning the state's primary.

Jewel Samad / AFP - Getty Images

Sanders meets 3-month-old Oliver Lomas, of Venice, Calif., who was dressed as Sanders during a rally at Bonanza High School on Feb. 14 in Las Vegas.

Evan Vucci / AP

7. Presidential candidate Bernie Sanders, backdropped by St. Peter's Basilica, talks during an interview with the Associated Press, at the Vatican Saturday, April 16. Sanders says he met Pope Francis Saturday morning before the pope left for his one-day visit to Greece. He says he was honored by the meeting, and that he told the pope he appreciated the message that he is sending the world about the need to inject morality and justice into the world economy. Alessandra Tarantino / AP

Sanders greets "The Late Show" host Stephen Colbert in New York City, June 23.

Lucas Jackson / Reuters

Barack Obama walks with Sanders down the Colonnade during their meeting at the White House in Washington on June 9. Sanders met with Obama after Hillary Clinton has already effectively clinched the Democratic nomination.

Pete Marovich / EPA

10.

Presidential candidate Hillary Clinton and Sanders stand together during a campaign rally where Sanders endorsed Clinton in Portsmouth, New Hampshire, July 12.

Brian Snyder / Reuters