Kentucky U.S. Senate candidate Ed Marskberry is suing the Kentucky Democratic Party for allegedly violating its own by-laws and favoring Alison Lundergan Grimes's candidacy.When Grimes announced earlier this month she was seeking the Democratic nomination to run against Republican Mitch McConnell the state party quickly sought donations.In a July 1 e-mail the KDP asked donors to help them build a grassroots effort to defeat McConnell and to "make sure Alison wins." The party's bylaws specifically forbid party officials from endorsing in a primary, however.Marksberry told WFPL earlier this month he was considering a lawsuit.But in an interview with The Washington Post, the Owensboro contractor confirmed he filed a suit in Franklin County Circuit Court on Monday."If I don’t get some respect, I’m going to pull out and run as an independent," Marksberry says. "They’ve picked on the wrong guy here."Marksberry is also threatening to run as an independent, which could put a dent in votes for Grimes given his more progressive leanings.FromWaPo: