Tuesday is Wisconsin's fall primary election. Among the races on the ballot is the Republican primary for U.S. Senate. Voters will decide which candidate should take on Democratic incumbent Tammy Baldwin in November.
The two front-runners in the primary are state Sen. Leah Vukmir of Brookfield, and Delafield business exec Kevin Nicholson. The race between Vukmir and Nicholson has been marked by bitterness. WUWM's Marti Mikkelson asked JR Ross of wispolitics.com, why that's been the case, in this week's "Capitol Notes" conversation.