El-Sayed, an epidemiologist, backs Medicare for all and decries corporate money in politics. He beat Rep. Haley Stevens, whose supporters said she would have had a better chance in the fall.
The U.S. Army's missile stockpile is dwindling and could take years to replenish. And, the Food and Drug Administration is deciding whether to approve a flu vaccine with mRNA technology.
Five states held primary elections Tuesday that could play a decisive role in which party controls Congress in the midterm elections. A look at the results and the race that's too close to call.
Michigan's Democratic Senate primary is too close to call. NPR's Michel Martin speaks with Michigan State University political science professor Matt Grossman about the race in the swing state.