Public opinion polls and recent primary results have shown that socialism is growing in popularity, even as there’s disagreement on what it means.

© Jillian Vordick/The New York Times

Representative Alexandria Ocasio-Cortez campaigned with Dr. Abdul El-Sayed in a swath of Michigan including areas won by President Trump, making a progressive pitch in a key Senate race.

© Zbigniew Bzdak for The New York Times

Representative Alexandria Ocasio-Cortez made the remarks about Dr. Abdul El-Sayed, the Democratic nominee for Senate in Michigan, as she considers whether to run for president in 2028.

© Kenny Holston/The New York Times