Bell won, NBC News projects, with ad support from a pro-Israel super PAC, while Bush had backing from prominent progressives.

A rivalry that began over Israel's war in Gaza will test how much Democratic voters' views on the U.S. ally have shifted.

St. Louis-area congressman Wesley Bell faces a Democratic primary rematch Tuesday with former congresswoman Cori Bush, who lost the seat to Bell in 2024.

Unlike the DSA newcomers who won in New York and Colorado, Bush has a political history looming over her comeback bid.