Connecticut Democratic Rep. John Larson faces primary challenge Tuesday from former Hartford Mayor Luke Bronin

Democratic Rep. John Larson of Connecticut is facing a contested Democratic primary on Tuesday, when voters in the state’s House district choose a party nominee in a challenge that includes former Hartford Mayor Luke Bronin, according to The Hill’s live updates.

The contest is notable because it is the only contested Democratic primary among Connecticut’s five House members, all of whom are seeking reelection, with the other races proceeding without a primary battle, The Hill reported. In Larson’s race, voters also selected among additional Democratic candidates, beyond Larson and Bronin, The Hill said.

Larson, the incumbent, has received support from Connecticut Democratic Sens. Richard Blumenthal and Chris Coons, The Hill reported as part of its account of the candidates and backing in the race. Bronin is attempting to win the nomination as the challenger, The Hill said.

The Hill’s live coverage frames the Tuesday vote as the key step in determining who will appear on the general-election ballot for the House seat, with the winner set to advance to the next stage of Connecticut’s federal election cycle.

With the primary underway, the practical impact for the district will center on which candidate becomes the Democratic nominee for the House seat. For Larson, a win would extend incumbency, while a loss would mark a change in which candidate seeks to represent the district in Congress.

The reporting also places the race in the broader context of congressional reelection contests across Connecticut, where multiple House members are pursuing new terms but only Larson’s seat includes a contested intra-party decision that could reshape the district’s Democratic slate.

As vote counts and results continue, the outcome will determine whether the district retains its current Democratic incumbent as the nominee or turns to the challenger, with the general election coming later in the cycle.