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

Gravis Marketing (R) Iowa 2016 GOP Caucus Poll 

• Donald Trump 31% (18.8%) {31.7%} [30.9%]
• Ted Cruz 31% (10.6%) {6.9%} [5.5%] (6%) {6%} [4%] (7%)
• Marco Rubio 9% (8.9%) {5.8%} [2.8%] (13%) {12%} [7%] (4%)
• Ben Carson 7% (14.1%) {15.8%} [5.1%] (12%) {9%} [5%]   
• Jeb Bush 4% (6.9%) {4.1%} [10.0%] (10%) {16%} [10%] (14%)
• Mike Huckabee 4% (1.8%) {2.6%} [6.0%] (8%) {8%} [7%] (9%)
• Carly Fiorina 3% (9.7%) {4.6%} [4.3%] (5%) {3%} [3%]
• Chris Christie 2% (1.4%) {2.0%} [0.8%] (4%) {5%} [9%] (5%)
• John Kasich 2% (2.6%) {1.4%} [5.0%]
• George Pataki 1% (0.3%) {0.1%} [0.6%] 
• Rand Paul 1% (2.4%) {1.3%} [0.8%] (4%) {9%} [10%] (8%)
• Rick Santorum 0% (1.3%) {0.6%} [2.9%] (6%) {2%} [6%]
• Unsure 5% (17.9%) {10.9%} {15%} {17%} [15%] (18%)

Survey of 440 Republican caucus participants was conducted December 18-21, 2015. The margin of error is +/- 5 percentage points.Results from the poll released October 1, 2015 are in parentheses. Results from the poll conducted August 29-31, 2015are in curly brackets. Results from the poll conducted July 29, 2015 are in square brackets. Results from the poll conductedMay 28-29, 2015 are in parentheses. Results from the poll conducted April 13, 2015 are in curly brackets. Results from the poll conducted February 12-13, 2015 are in square brackets. Results from the poll conducted January 5-7, 2015are in parentheses.