Democratic socialist Melat Kiros beat Rep. Diana DeGette in a Colorado primary Tuesday, a stunning victory for the first-time candidate against a nearly 30-year incumbent

Melat Kiros, a 29-year-old democratic socialist and lawyer, is challenging 15-term Rep. Diana DeGette for a solidly blue seat in Denver, where she and her allies hope voters are…

Colorado's primary has Democratic incumbents fighting off challenges ranging from progressive newcomers to state lawmakers seeking higher office.