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

NBC News/Marist Iowa 2016 GOP Caucus Poll

• Donald Trump 29% {17%} 
• Ben Carson 22% {8%} [6%] 
• Jeb Bush 6% {12%} [16%] (12%)
• Carly Fiorina 5% {1%}
• Rand Paul 5% {5%} [7%] (12%) 
• Scott Walker 5% {19%} [15%] (5%) 
• Ted Cruz 4% {4%} [2%] (7%)
• Bobby Jindal 4% {1%}
• Marco Rubio 4% {4%} [6%] (7%)
• Mike Huckabee 3% {7%} [17%]
• Chris Christie 2% {2%} [9%] (8%)
• John Kasich 2% {2%}  
• Rick Santorum 1% {0%} [5%] (9%)
• Jim Gilmore 0% {0%}
• Lindsey Graham 0% {1%} [1%]
• George Pataki 0% {0%} 
• Rick Perry 0% {3%} [4%] (7%)
• Undecided 8% {14%} [14%] (20%)

Survey of 390 potential GOP caucus-goers was conducted August 26 - September 2, 2015.  The margin of error is +/- 5.0 percentage points. Results from the poll conducted July 14-21, 2015 are in curly brackets. 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.