Charles Grassley (R): 59%
Roxanne Conlin (D): 31%
Charles Grassley (R): 59%
Bob Krause (D): 26%
Charles Grassley (R): 61%
Tom Fiegen (D): 25%
This statewide telephone survey of 500 Likely Voters in Iowa was conducted by Rasmussen Reports January 26, 2010. The margin of sampling error for the survey is +/- 4.5 percentage points with a 95% level of confidence.
http://www.rasmussenreports.com/public_content/politics/elections2/election_2010/election_2010_senate_elections/iowa/toplines/toplines_2010_election_iowa_senate_january_26_2010