By Rebecca Blatt
Former Maryland Gov. Robert Ehrlich says he will challenge current Maryland Gov. Martin O'Malley in November's election.
Ehrlich's announcement sets up a rematch between Maryland's two biggest political foes.
Ehrlich became Maryland's first Republican governor in a generation when he defeated then-Lt. Gov. Kathleen Kennedy Townsend in 2002.
Four years later, Ehrlich lost his re-election bid with 46 percent of the vote. O'Malley, then the mayor of Baltimore, received 53 percent of the vote.