Fourteen Terms Ended Tuesday Night: Luke Bronin Unseats John Larson by Nearly 20 Points in Hartford

Rep. John Larson, who has represented central Connecticut since the late 1990s, lost the Democratic primary for the state's 1st Congressional District on Tuesday to former Hartford Mayor Luke Bronin, ending one of the longest tenures in the House Democratic caucus. CBS News projected the race late Tuesday evening, and The Associated Press called it around 10 p.m.

With just over half the vote counted at roughly 10:15 p.m. ET, Bronin led Larson by just under 20 percentage points — a margin of nearly 7,000 votes. West Hartford state Rep. Jillian Gilchrest and Hartford Board of Education member Ruth Fortune trailed the two front-runners. Bronin will face Republican nominee Amy Chai, who ran unopposed, in a Hartford-area seat that has been reliably Democratic for decades.

The candidates agreed on most of the policy questions that usually decide a primary. What they did not agree on was whether a 78-year-old incumbent seeking a 15th term was the right person to send back to Washington. Bronin, 47, built his entire campaign around that gap. His website promised "new energy, new ideas, and new perspectives," and he repeatedly cast Larson as the status quo candidate. "The stakes are too high to keep doing the same thing," he told voters.

The warning signs arrived in May, when the Connecticut Democratic Party endorsed Bronin over the incumbent at its convention — an upset that prompted Bronin to call on Larson to "pass the torch." Former Transportation Secretary Pete Buttigieg, a 2020 presidential candidate widely viewed as a possible 2028 contender, endorsed Bronin earlier this year. Bronin also outraised the incumbent, pulling in just over $3 million during the primary to Larson's $2.7 million.

Larson ran on the opposite argument: that seniority is leverage. He pointed to his decades of committee work and told Hartford CBS affiliate WFSB-TV that his return would carry institutional weight a newcomer could not match. "We are going to come in as a full committee chairman, not as some freshman in Congress with some assignment," he said. House Minority Leader Hakeem Jeffries campaigned for him in the closing stretch.

It was not enough. Larson becomes the 10th sitting House member to lose a primary this cycle — seven Democrats and three Republicans — and the loss lands in the middle of a broader argument inside the Democratic Party about whether long-serving incumbents should step aside as the party tries to build a case against President Trump's second term. Bronin, who served two terms as mayor of a city that spent years fighting off insolvency, spent the campaign arguing that the moment demands different people, not just different positions. On Tuesday, roughly 60 percent of the district's Democratic primary voters agreed with him.