Rep. Michele Bachmann (R-Minn.) said she wasn't accepting the apology of Fox anchor Chris Wallace, who asked her Sunday if she was a "flake."

Bachmann rejected an apology from Wallace, who challenged whether the Tea Party-aligned congresswoman was serious in her bid for the Republican presidential nomination.

"I think that it's insulting to insinuate that a candidate for president is less than serious," Bachmann said in an interview on ABC when asked about Wallace's apology, which he posted online.

"Those are the small issues," Bachmann said when specifically pressed about whether she accepted the apology. "I'm focused on the big one."

A weekend poll of likely Republican caucus-goers in Iowa showed that she was in contention for the nomination in Iowa, and her performance at a New Hampshire debate earlier this month has political observers buzzing with speculation that the three-term congresswoman might just make a credible run for the nomination.