updated
By Rachel E. Stassen-Berger and Corey Mitchell
With an early morning video message to supporters, embattled Republican U.S. Rep. Michele Bachmann announced she would not run for re-election next year.
"My dear friends, after a great deal of thought and deliberation, I have decided next year that I will not seek a fifth congressional term to represent the wonderful people of the Sixth District of Minnesota," Bachmann said in the Wednesday morning video. "I've never considered holding public office to be an occupation."
The high-profile congresswoman had a narrow re-election last year and is under federal investigation for her 2012 presidential campaign. A recent poll found that a rematch with her 2012 Democratic challenger, Jim Graves, was a dead heat.
In a polished video message, which included her personal list of what she believes she accomplished during her eight years in Washington, she said supporters could "rest assured" that neither of those challenges influenced her decisions
Graves said that Bachmann's decision shows she "recognized that it would be an uphill battle for her going forward." People in the district, said the millionaire hotelier, are "eager to be represented by a common-sense business person."
Although Bachmann's district is the most Republican in the state, she only bested Graves by about 1 percentage point, or about 4,200 votes, in 2012. In November, Republican presidential candidate Mitt Romney won 56.5 of the vote in the district.