Tuesday’s primaries will give Democrats a big idea on how much the far left has taken hold of the party

• Michigan’s primary is over, but another pair of tests loom for the progressive left.
• On Tuesday, voters in two midwestern states will decide a pair of races that have become the latest battlegrounds of the Democratic Party’s ongoing civil war.
• In Wisconsin, progressive candidate Francesca Hong is leading in all available polling in the Democratic primary for governor.