Sen. Bernie Sanders, I-Vt., speaks at a rally demanding presidential action to raise the minimum wage to $15 an hour. Sanders will run to Hillary Clinton's left, trying to elevate economic issues.
Win McNamee/Getty Images
Former Secretary of State Hillary Clinton speaks at the Clinton foundation's Clinton Global Initiative conference with her husband, Bill, and daughter, Chelsea, looking on.
Michael Loccisano/Getty Images
Hillary Clinton addresses the Pennsylvania AFL-CIO three weeks before the Democratic primary contest against Barack Obama. Seated at right is Pennsylvania AFSCME President Gerald W. McEntee.
Hillary Clinton begins to speak as her husband, former President Bill Clinton, moves to take a seat after introducing her at the Clinton Global Initiative on Sept. 22, 2014, in New York.
Hillary Clinton has described herself as the most famous person you don't really know. And as she launches into her second presidential campaign, she'll be reintroducing herself to voters who largely think they have her figured out.