WEST WINDSOR -- Insofar as there was ever any question -- or, worse, controversy -- over who would replace newly-minted U.S. Rep. Bonnie Watson Coleman (D-12) in the 15th legislative district, Mercer County Democrats put the issue to rest this morning, presenting the picture of a particularly united political force when they unanimously elected committee chairwoman Liz Muoio to serve as successor to New Jersey's first African American congresswoman.