McCain Regrets Vote against MLK Day

John McCain, speaking in Memphis on the 40th anniversary of Dr. Martin Luther King's assassination, said he was wrong to vote against a federal holiday in honor of King. The audience clamored and booed McCain when he acknowledged the vote -- see the video below.

Hillary Clinton and Barack Obama also spoke about King today, Clinton in Memphis and Obama in Fort Wayne, Ind.

See Clinton's speech here. See Obama's speech here.

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