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Three weeks to go, three margin-of-error races

Three weeks to go until the first nominating contest, and we have three margin-of-error races, according to new NBC/WSJ/Marist early-state polls.

Democratic presidential candidates Hillary Clinton and Bernie Sanders wave following the First in the South Presidential Candidates Forum held at Winthrop University in Rock Hill, S.C. on Nov. 6, 2015. (Photo by Chris Keane/Reuters)
Democratic presidential candidates Hillary Clinton and Bernie Sanders wave following the First in the South Presidential Candidates Forum held at Winthrop University in Rock Hill, S.C. on Nov. 6, 2015.REUTERS

Chuck Todd

Chuck Todd is NBC News' chief political analyst and the former moderator of "Meet The Press."

Mark Murray