- Bruce Braley (D) - 41%
- Mark Jacobs (R) - 38%
- Bruce Braley (D) - 40%
- Joni Ernst (R) - 37%
- Bruce Braley (D) - 40%
- Matt Whitaker (R) - 36%
- Bruce Braley (D) - 44%
- Sam Clovis (R) - 31%
Survey of 750 likely Iowa voters. The survey was conducted on March 24, 2014 - March 25, 2014. The margin of error is +/- 4%.