New poll numbers from Survey USA give Rep. Michele BachmannMichele Marie BachmannBachmann won't run for Franken's Senate seat because she did not hear a 'call from God' Billboard from ‘God’ tells Michele Bachmann not to run for Senate Pawlenty opts out of Senate run in Minnesota MORE (R-Minn.) a nine-point lead in her race for reelection. But in a potentially troubling sign for the incumbent, the poll has Bachmann below 50 percent.

She leads state Sen. Tarryl Clark (D) 48 percent to 39 percent. 

Third-party candidate Bob Anderson took 6 percent of the vote, with another independent candidate polling at 2 percent. Just 5 percent of respondents said they were undecided. The margin of error is +/- 4.2 percentage points.

Hovering around 50 percent is nothing new for Bachmann. In 2008, she won with 46 percent of the vote, while a third-party challenger took 10 percent. And in 2006, Bachmann won her first race with just 50 percent.

The contest between Bachmann and Clark is expected to be one of the most expensive congressional races in the country in 2010. Bachmann just announced a huge fundraising quarter — she raised $1.7 million in the second quarter.

Clark did her best to keep pace and posted an impressive $910,000 second quarter. Neither campaign released their cash-on-hand numbers.