The poll, conducted by the Democratic firm Greenberg Quinlan Rosner and first reported Monday by Salon, showed 48 percent of likely voters supporting Bachmann and 46 percent backing Graves in the race for Minnesota’s 6th district. A previous GQR poll in June had Bachmann ahead by 5 points, 48 to 43 percent.Rep. Michele Bachmann (R-Minn.) is polling within the margin of error of Democratic challenger Jim Graves, according to an internal poll from the Graves campaign.

Publicly-released internal polls often show results skewed toward their sponsor by several points, largely because candidates tend to release only more favorable results.

Graves, a hotel executive, is the first Democrat to run head-to-head against Bachmann; her past three challengers have also faced candidates from the Independence Party.

Graves’ son Adam, who manages his campaign, told Salon he was excited about the results. “The first thing that’s notable is that obviously her recent comments, the stories that she’s created for herself, have really hurt her among folks in the middle,” he said. Bachmann attracted controversy this summer when she alleged that the Muslim Brotherhood had infiltrated the U.S. government.