A poll released Thursday shows Sen. Bernie Sanders (I-Vt.) taking a slight lead for the first time over former secretary of state Hillary Clinton in Iowa in the race for the Democratic presidential nomination.
Sanders was favored by 41 percent among likely caucus voters, according to the Quinnipiac University poll, while 40 percent preferred Clinton. The lead is within the poll's margin of error. Another 12 percent backed Vice President Joe Biden, who has not said whether he's running.
As Politico noted, the poll represents a significant leap for Sanders. In July, a Quinnipiac poll of Iowa voters showed Clinton with a 52-33 percent lead.