The latest battle over the Democratic ideological divide this year shifts to the upper Midwest on Tuesday as nominating contests for governor in Wisconsin and U.S. senator in Minnesota pit left-wing candidates against more traditional ones. Peggy Flanagan is running for the nomination for an open Senate seat against centrist Democratic Rep. Angie Craig. Left-leaning candidates have consistently won primaries, capitalizing on Democratic voter frustration at party leadership. President Donald Trump won Wisconsin in 2024 and its state legislature has long been in the hands of the GOP, but Democrats have been bullish about reversing that trend. The winner of the Democratic primary will face Republican Rep. Tom Tiffany in November.