Audrey DeGray, a Democrat, and Ed Breeder, a Republican, are in a heated battle for the recently repartitioned 10th Congressional District in Massachusetts.
The two campaigns have traded rhetoric, with neither side yielding any ground.
Rumors have swirled for years that Mr. Breeder, an Army veteran, is a well-known womanizer, and has noticed his support base slip a few percentage points over the last few weeks.
Ms. DeGray is seeking to capitalize on this development, as text messages from Mr. Breeder’s alleged mistress were released via Twitter this morning. Worse for the Breeder campaign, there is speculation that the candidate fathered a secret child.
Mr. Breeder has denied the allegations via his campaign spokesman.