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Super Tuesday exit polls: Clinton wins big on Super Tuesday, but vulnerabilities persist

Despite Hillary Clinton's impressive advance, she shows vulnerabilities with groups of voters that she will need to win the presidency if she is the nominee.

Hillary Clinton speaks to supporters during her victory speech on Super Tuesday in Miami, Fla., March 1, 2016. (Photo by Mark Peterson/Redux for MSNBC)
Hillary Clinton speaks to supporters during her victory speech on Super Tuesday in Miami, Fla., March 1, 2016.

NBC News Exit Poll Desk