Sayed, outspent nearly 10-to-1, tapped into anti-Washington sentiment and pitched an economic populism that included shunning corporate donors and backing Medicare for All. From the stage at El Sayed’s election-night party,

Votes are being counted in Michigan, where Democratic voters are settling a Senate primary that has become the year’s most significant test of how the party’s electorate is weighing questions of ideol...

The bitter, expensive race pits Dr. Abdul El-Sayed, a progressive former public health official, against Representative Haley Stevens, a centrist supported by party leaders.