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Pena to endorse Obama

From NBC's Mark Murray and Chuck Todd
Two days before the Democratic Univision forum in Miami -- and a day after a new poll showed Obama more competitive than Clinton in Colorado (although within the margin of error) -- the Obama campaign will hold a conference call with reporters later today to announce the endorsement of former Denver Mayor Federico Pena, who served as secretary of Energy and Transportation in Bill Clinton's Administration.

To the best of our knowledge, this is Obama's biggest Hispanic endorsement (outside of those he's won in his home state of Illinois). So far, Clinton has been viewed as having the big lead among Hispanics in the race for the Democratic nomination.