Maine's Grand Old Party sank to a new low this month when its two U.S. senators, Olympia Snowe and Susan Collins, bolted across the aisle and helped the party of President Obama pass the $800 billion stimulus bill. If past is prologue, we probably should have expected as much. Snowe and Collins, who pride themselves as being centrist Republicans with a maverick streak in the mold of the late Maine political icon Margaret Chase Smith, have time after time voted or taken positions that are counter to the principles of their own party. For conservative Maine Republicans, the Snowe-Collins rogue...