SUPERIOR, WI (KDAL) - One of several Democrats who are vying to take on Governor Scott Walker in a recall election in June is visiting northwestern Wisconsin.  Milwaukee Mayor Tom Barrett is making a campaign stop in Ashland on Thursday and will be in Superior and Rice Lake on Friday.  Barrett will be joined by State Senator Bob Jauch and State Representative Nick Milroy at the Superior Democratic Party Headquarters at 9 a-m Friday.  Both legislators are expected to announce their support of Barrett in the Democratic primary next month.