Michelle Obama, Julian Castro Open Dem. Convention
Description:Michelle Obama made the case Tuesday for her husband's reelection by contending that he was the same person who voters embraced four years ago — and by implicitly skewering his November opponent.
Mrs. Obama followed an electrifying speech by San Antonio Mayor Julian Castro, the first Latino to keynote a Democratic National Convention. His national debut put the Harvard-educated Texan on the national map, recalling the way that Barack Obama's keynote did in 2004,(2:04)