Kentucky Senate candidate Alison Lundergan Grimes's Democratic primary opponent is suing the state Democratic Party for allegedly favoring her candidacy, and says he might run as an independent.

Ed Marksberry, a former congressional candidate who lost badly in a matchup with Rep. Brett Guthrie (R-Ky.) in 2010, told Post Politics he filed a lawsuit in Franklin County Circuit Court on Monday and delivered it to Kentucky Democratic Party Chairman Dan Logsdon.

"If I don’t get some respect, I’m going to pull out and run as an independent," Marksberry said, adding: "They’ve picked on the wrong guy here."