Chris Larson upsets Jon Erpenbach to become the Wisconsin Senate minority leader.

This is very intra-Wisconsin, but you may have seen Instapundit's item "DEMOCRATIC WHITE MALE SENATORS CONSPIRE to block a black woman’s committee chairmanship. In Wisconsin" ... which links to a somewhat abstruse Charlie Sykes piece about state senator Bob Wirch breaking "his promise to vote for Senator Jon Erpenbach" supposedly to get the seat that Lena Taylor would otherwise have on the joint finance committee. (She wouldn't continue as chairwoman, in any case, because her party is going into the minority.)  Taylor is black, and these are all Democrats interacting with each other, which gives the conservative Sykes an opportunity to inflict a little pain.