Abdul El-Sayed, backed by Sen. Bernie Sanders, is up against four-term Rep. Haley Stevens, supported by Senate Democratic leader Chuck Schumer. Democratic and Republican voters in Michigan are also deciding on their parties’ nominees to succeed term-limited Democratic Gov. In Kansas, Missouri, Virginia and Washington state, voters are settling primaries in a host of races, including a key rematch between Democrats in a Missouri House contest. Test time for Democrats in Michigan’s Senate raceThe choice between El-Sayed and Stevens has become a focal point for Democrats this year, and the race has become bitter. Whoever wins will need to bring splintered factions back into the fold to beat Republican Mike Rogers, a former congressman.