By Larry J. Sabato, university professor of politics and director of the U.Va. Center for PoliticsIn 36 states, the same party controls the entire statehouse—the governorship and both houses of the legislature. Most observers would agree that Washington’s toxic level of nastiness and inability to compromise has not yet fully poisoned most state capitols. ... So far at least, the parties are on par: Democrats and Republicans each have three truly vulnerable statehouses.