Poll Watch: NBC News/Wall Street Journal/Marist Iowa 2016 Democratic Caucus Survey

NBC News/WSJ/Marist Iowa 2016 Democratic Caucus Poll

• Hillary Clinton 48% [47%] (48%) {55%}
• Bernie Sanders 45% [36%] (37%) {26%}
• Martin O'Malley 5% [4%] (4%) {4%}
• Undecided 3% [13%] (8%) {13%}

Survey of 422 likely Democratic caucus-goers was conducted January 2-7, 2016.  The margin of error is +/- 4.8 percentage points. Results from the poll conducted September 23-30, 2015 are in square brackets. Results from the poll conducted August 26 - September 2, 2015 are in parentheses. Results from the poll conducted July 14-21, 2015 are in curly brackets.