Wisconsin Democrats have made their choice. Now both parties are preparing for a costly and bruising fight to the finish in the state’s gubernatorial recall election.

Milwaukee Mayor Tom Barrett, after Tuesday night’s primary, will now face off against Republican Gov. Scott Walker in the state’s closely watched recall. Barrett will effectively lead his party into the final stretch of the ideological battle that has kept the Dairy State bitterly divided for a year-and-a-half and the nation looking to Wisconsin as a weather vane for national partisanship.

Barrett narrowly lost to Walker in the 2010 gubernatorial race. He seemed an obvious choice for a second round. If his victory speech in downtown Milwaukee Tuesday was any gauge, the final stretch is going to be nasty.