Rep. Michele Bachmann (R-Minn.) said early Wednesday that she won't seek a fifth term in office. Bachmann, a tea party favorite who ran for the Republican presidential nomination last year, announced her decision on Facebook and in a nearly 9-minute YouTube video posted on her website.

"The law limits anyone from serving as president of the United States for more than eight years," Bachmann says in the video. "And in my opinion, eight years is also long enough for an individual to serve as a representative for a specific congressional district."

Bachmann didn't provide a specific reason for stepping down, but she said her decision was "not influenced by any concerns about ... being reelected."

The conservative lawmaker has served in the House of Representatives since 2007 and is the first Republican woman to represent Minnesota in Congress. She narrowly won a fourth term in 2012 over Democrat Jim Graves, a hotel chain founder who's running again in 2014.

Bachmann said an ethics investigation about alleged misconduct during her failed 2012 presidential campaign had nothing to do with her withdrawal. “The decision was not impacted in anyway by the recent inquiries into the activities of my former presidential campaign or my formal presidential staff," she said. "It was clearly understood that compliance with all rules and regulations was an absolute necessity for my campaign, and I have no reason to believe that this was not the case.”