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

NBC News/Marist Iowa 2016 Democratic Caucus Poll

• Hillary Clinton 49% [68%] (70%)
• Bernie Sanders 25% [7%]
• Joe Biden 10% [12%] (20%)
• Martin O'Malley 3% [0%]
• Jim Webb 1% [1%]
• Lincoln Chafee 0%
• Undecided 11% [12%] (10%)

If Joe Biden does not run:

• Hillary Clinton 55%
• Bernie Sanders 26%
• Martin O'Malley 4%
• Jim Webb 2%
• Lincoln Chafee 1%
• Undecided 13%

Survey of 320 potential Democratic caucus-goers was conducted July 14-21, 2015.  The margin of error is +/- 5.5 percentage points. Results from the poll conducted February 3-10, 2015 are in square brackets. Results from the poll conducted July 7-13, 2014 are in parentheses.