Justice Democrats, which gained prominence backing Alexandria Ocasio-Cortez, is on track to see more of its candidates elected. Will the party listen to them?

© Chet Strange for The New York Times

Justice Democrats, which gained prominence backing Alexandria Ocasio-Cortez, is on track to see more of its candidates elected. Will the party listen to them?

© Chet Strange for The New York Times

Representative Jimmy Gomez, who represents a safe Democratic district, is facing an intraparty challenge from a progressive candidate.

© Eric Lee for The New York Times