Incumbent April McClain Delaney (D) defeated David Trone (D) and six others in the Democratic primary to represent Maryland's 6th Congressional District on June 23. McClain Delaney and Trone led in endorsements and fundraising.
Trone represented the district from 2019 to 2025. In 2024, he did not run for re-election and instead ran in the Democratic primary for U.S. Senate, losing to Angela Alsobrooks 53.4%-42.8%. Trone endorsed McClain Delaney as his successor for the 6th District, and she was elected in 2024 with 53% of the vote. McClain Delaney's husband, John Delaney (D), represented the district from 2013 to 2019.
Inside Elections' Nathan Gonzales wrote, "With Trone’s deep pockets and McClain Delaney being an incumbent, the 6th District could end up being one of the most expensive House primaries in the country." Founder of Total Wine & More, Trone self-financed his campaigns. In his 2024 Senate campaign, he spent more than $61 million. In his initial election to the House in 2018, he spent more than $18 million. St. Mary’s College of Maryland professor Todd Eberly wrote, "I think [Trone] really wants that seat back, and I think he’s probably going to be willing to spend whatever is necessary to do that."
