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

NBC News/WSJ/Marist Iowa 2016 GOP Caucus Poll

• Donald Trump 24% (29%) {17%} 
• Ben Carson 19% (22%) {8%} [6%] 
• Carly Fiorina 8% (5%) {1%}
• Jeb Bush 7% (6%) {12%} [16%] (12%) 
• Ted Cruz 6% (4%) {4%} [2%] (7%)
• Marco Rubio 6% (4%) {4%} [6%] (7%)
• Bobby Jindal 6% (4%) {1%}
• Mike Huckabee 5% (3%) {7%} [17%]
• Rand Paul 4% (5%) {5%} [7%] (12%)
• Chris Christie 4% (2%) {2%} [9%] (8%)
• John Kasich 3% (2%) {2%}  
• Rick Santorum 1% (1%) {0%} [5%] (9%)
• Lindsey Graham 1% (0%) {1%} [1%]
• George Pataki 0% (0%) {0%} 
• Jim Gilmore 0% (0%) {0%}
• Undecided 7% (8%) {14%} [14%] (20%)

Who is your second choice for the 2016 Republican presidential caucus in Iowa?

• Ben Carson 17% (21%)
• Donald Trump 14% (12%)
• Carly Fiorina 13% (6%)
• Marco Rubio 10% (4%)
• Jeb Bush 10% (9%)
• Ted Cruz 8% (6%)
• Rand Paul 6% (3%)
• Mike Huckabee 6% (4%)
• Bobby Jindal 5% (4%)  
• Rick Santorum 3% (2%)
• Chris Christie 2% (2%)
• John Kasich 2% (3%)
• Lindsey Graham 2% (1%)
• George Pataki 1% (1%)
• Jim Gilmore 0% (0%)
• Undecided 3% (8%)

Survey of 431 potential GOP caucus-goers was conducted September 23-30, 2015.  The margin of error is +/- 4.7 percentage points. Results from the poll conducted August 26 - September 2, 2015 are in parentheses. 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.