Michelle Obama speaks at a rally aimed at young voters. A Gallup poll found 75 percent of Republicans were 'certain' to vote, compared to 68 percent of Democrats.

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he Democratic National Convention will begin in Charlotte, N.C., on Tuesday, as the Left tries to rally enthusiasm around President Obama, "who carries the power and burden of the incumbency." First Lady Michelle Obama will deliver what is likely the night's most anticipated speech. She'll take the stage in the 10 p.m. EST hour, after Julian Castro, the mayor of San Antonio and Latino rising star, gives the keynote. On Wednesday, Democrats will officially re-nominate Obama and Vice President Joe Biden with a roll call, and former President Bill Clinton will speak. On Thursday, the last night of the convention, Obama will address the crowd.