(NewsNation) — Progressive Abdul El-Sayed is taking on Rep. Haley Stevens, D-Mich., in the latest showdown between progressive and establishment Democrats this primary season. The primary has become one of the clearest tests yet of where Democratic voters want their party to go. El-Sayed, a progressive backed by Sen. Bernie Sanders and other leaders on the party's left, has run against much of the Democratic establishment. Michigan officially has a state duckAdvertisement AdvertisementStevens, a four-term congresswoman backed by Senate Democratic leader Chuck Schumer and many of Michigan's top Democrats, has made electability and experience central to her case. The winner will take on Republican Mike Rogers in the general election, who is unopposed in the primary.