Poll Watch: Gravis Marketing (R) Iowa 2016 Democratic Caucus Survey

Gravis Marketing (R) Iowa 2016 Democratic Caucus Poll

• Hillary Clinton 45.1% [50.8%] (59%)
• Bernie Sanders 16.9% [24.0%] (15%)
• Joe Biden 13.4% [6.3%]
• Martin O'Malley 4.9% [4.7%] (3%) 
• Elizabeth Warren 4.6% [10.7%]
• Jim Webb 1.2% [1.3%] (3%) 
• Lincoln Chafee 0.5% [2.1%] (1%)

Survey of 421 Democratic caucus participants was conducted August 29-31, 2015. The margin of error is +/- 4.8 percentage points. Results from the poll conducted July 29, 2015 are in square brackets. Results from the poll conducted May 28-29, 2015 are in parentheses.