Akin Narrows Gap with McCaskill

A new Mason-Dixon poll in Missouri finds Sen. Claire McCaskill (D) with a narrow lead over Rep. Todd Akin (R) in the U.S. Senate race, 45% to 43%.

Akin is benefiting from McCaskill’s “seemingly intractable favorability rating, one of the few constants in a race of dizzying changes this year. The poll found that while McCaskill has a much higher favorable rating than Akin does — at 40%, to his 28% — she also has the higher unfavorable rating, at 47% to his 42%.”

Update: McCaskill reponds releasing an internal poll showing her with a huge, 52% to 39% lead. National Journal suggests one reason to believe this poll is that the DSCC is already cutting ad spending in the state.