Physician Victoria Wulsin (D) released internal polling Thursday that showed her trailing Rep. Jean Schmidt (R-Ohio) by a single point.
Schmidt led Wulsin 37 percent to 36 percent, while conservative businessman David Krikorian (I) received 11 percent and 16 percent were undecided.
Wulsins pollster, Momentum Analysis, interviewed 400 likely voters Sept. 29-30. The margin of error was 4.9 percent.
A Momentum Analysis (D) poll from the end of June gave Schmidt an 8-point lead over Wulsin, with Krikorian at 6 percent.
Other public polls have shown a tight race between Schmidt and Wulsin with good reason. This is Wulsins third bid for the seat and she lost to Schmidt in 2006 by only 2,500 votes.
The district has voted Republican in presidential cycles, but voter dissatisfaction with Schmidt whose first term in office was marked by public gaffes in the media has made her a target for national Democrats.