Rasmussen’s most recent poll result is fascinating, but mitigated a bit by the fact that Ben Nelson isn’t up for reelection until 2012:

If Governor Dave Heineman challenges Nelson for the Senate job, a new Rasmussen Reports telephone survey shows the Republican would get 61% of the vote while Nelson would get just 30% . . . When survey respondents were asked how they would vote if Nelson blocks health care reform, 47% still pick Heneman while 37% would vote to keep the incumbent in office. Twenty percent (20%) of those who initially said they’d vote for Heineman say they’d switch to supporting Nelson.