Poll Watch: Gravis Marketing/One America News Network (R) Iowa 2016 Democratic Caucus Survey

Gravis Marketing/OAN (R) Iowa 2016 Democratic Caucus Poll

• Hillary Clinton 50.8% (59%)
• Bernie Sanders 24.0% (15%)
• Elizabeth Warren 10.7% 
• Joe Biden 6.3%
• Martin O'Malley 4.7% (3%)
• Lincoln Chafee 2.1% (1%)
• Jim Webb 1.3% (3%) 

Survey of 236 Democratic caucus participants was conducted July 29, 2015. The margin of error is +/- 6.4 percentage points. Results from the poll conducted May 28-29, 2015 are in parentheses.