Maine Senate hopeful Graham Platner vowed not to be an “a**hole” like Sen. John Fetterman (D-PA) if elected, escalating their feud.

Fetterman, never one to be afraid to differentiate himself from his Democrat colleagues, has been one of the rare congressional Democrats to openly attack the scandal-ridden Platner. On Monday, Platner launched his own attack against the Pennsylvania Democrat while discussing his hypothetical future in the Senate.