The poll, from Democratic outfit Public Policy Polling, gives Obama 51 percent support to Romney’s 44 percent support, an increase in his lead by 5 percentage points since the last PPP poll of the state.

{mosads}That could be due to Romney’s declining favor with voters there: 40 percent of voters view him favorably, down from 47 percent in August, and 55 percent view him negatively, up from 48 percent in August.

Obama’s approval went from underwater in the last poll to slightly positive, with 49 percent of likely Iowa voters viewing him favorably and 48 percent viewing him negatively.

Obama leads every demographic and age group in the state, and is cementing his support among Democrats, receiving 91 percent of their backing, up from 87 percent in August. The PPP poll also indicates that enthusiasm is higher among Iowa Democrats than Republicans, as 62 percent of Democrats say they’re “very excited” to vote, compared to 55 percent of Republicans.

And the poll indicates that Romney’s “47 percent” comments could be hurting him in Iowa. Fifty-one percent of voters in Iowa consider the comments to be inappropriate, and 42 percent of voters say the comments made them less likely to vote for him.

The poll was conducted among 754 likely Iowa voters from Sept. 24-26 and has a margin of error of 3.6 percentage points.