Democratic Representative John Larson of Connecticut, a 14-term incumbent who has served in Congress since the Clinton era, lost his primary to Hartford Mayor Luke Bronin in a closely contested race. The result marks a significant upset within Connecticut's Democratic establishment and reflects a broader pattern of long-serving incumbents facing serious challenges from younger, locally rooted rivals in this year's primary cycle.

Larson faced three challengers in the primary: Bronin, state Representative Jillian Gilchrest, and Hartford Education Board member Ruth Fortune. The district covers Hartford and surrounding areas, and Bronin's victory as an "upstart progressive mayor" ends Larson's long tenure representing the seat, with the race decided on Tuesday.