1st Congressional District

Jake Johnson won the Democratic nomination for U.S. House. This win took place in Minnesota’s 1st Congressional District. The report was sourced from Washington.

Connecticut Democrats are facing a major internal decision regarding the 1st Congressional District. The party must weigh generational change as U.S. Rep. John Larson faces primary fight. They have a choice between supporting him or fielding one of his younger challengers.

Campaigns in Virginia's 1st and 2nd Congressional Districts are expected to be expensive and intensely fought, with control of the U.S. House of Representatives at stake. Both the Democratic Congressional Campaign Committee and the National Republican Congressional Committee, along with Super PACs, are anticipated to flood these districts with ads containing potential inaccuracies. Key contests include Shannon Taylor facing Rob Wittman in the 1st Congressional District.

Rep. Wesley Bell has defeated Cori Bush in the House Democratic primary in Missouri's 1st Congressional District. Bush had sought to retake the seat after Bell previously defeated her in the 2024 primary by 5 percentage points.

Virginia primary voters selected Bert Mizusawa as the Republican nominee to challenge U.S. Senator Mark Warner in the Senate race and finalized key U.S. House primary contests. Decisive outcomes were reported in the 1st, 2nd, and 5th Congressional Districts, with notable candidates advancing.

Virginia voters participated in primary elections on August 4, 2026, focusing on races including a GOP challenge to U.S. Sen. Mark Warner and key congressional districts. Polls operated from 6 a.m. to 7 p.m., with resources available through the Virginia Department of Elections for voter registration and polling place checks.

Virginia residents will vote in a primary to select nominees for U.S. Senate and House races, with competitive districts including the 2nd and 1st Congressional Districts. A court invalidated a new congressional map approved by voters, and key candidates include Jen Kiggans, Elaine Luria, Rob Wittman, and Shannon Taylor. The Senate race features unopposed Democrat Mark Warner against Republican challengers.

Virginia residents will vote in a primary to choose nominees for U.S. Senate and House, with key races in competitive districts that could influence November's House control. The current congressional map remains in use after a court invalidated a new map approved by voters. Notable candidates include Jen Kiggans in the 2nd District and Rob Wittman in the 1st District.

Missouri expects up to 1.4 million voters in its primary election, driven by two major ballot measures (Amendments 4 and 5) and congressional primaries in three districts. Secretary of State Denny Hoskins predicts 32% voter turnout, the highest since 2004, with significant variation across counties ranging from 20% to 70%.

Shimon Blau, a first-time unaffiliated candidate in the 1st Congressional District, has qualified for the ballot and will face Melat Kiros. Blau, who is Jewish, cited concerns over Kiros' statements on Israel and refusal to label the Boulder firebombing of a Jewish community rally as antisemitic as reasons for entering the race.

Missouri congressional incumbents hold a significant cash advantage over challengers ahead of the August 4 primary, with $13.6 million in campaign funds compared to $1.9 million for opponents. U.S. Rep. Emanuel Cleaver faces multiple Republican challengers in the 5th District, while U.S. Rep. Wesley Bell faces Cori Bush in the 1st District. Outside groups have spent over $3.5 million in primary races, exceeding candidate spending in some cases.

Amish Shah won the Democratic primary in Arizona's 1st Congressional District, defeating the DCCC-backed candidate Marlene Galán-Woods. He will face Republican Jay Feely, endorsed by President Donald Trump, in the general election. The race is seen as pivotal for determining control of the U.S. House.

Trump-endorsed candidates dominated key Republican contests in Arizona primaries, including Andy Biggs for governor and Jay Feely in the 1st Congressional District. Democrats avoided a potential left-wing upset in the 4th District as Rep. Greg Stanton held his lead.

Arizona voters are selecting nominees for November’s congressional races, with two open House seats at stake. Republican Reps. Andy Biggs and David Schweikert are competing in a GOP primary to challenge Gov. Katie Hobbs, while Schweikert’s seat in the 1st Congressional District is highlighted as a key race.

Arizona Republicans are selecting nominees for governor and other key offices, with U.S. Reps. Andy Biggs and David Schweikert competing in a primary race to challenge Democratic Gov. Katie Hobbs. The candidates differ in their approaches to aligning with President Donald Trump, with Biggs backed by Trump and Turning Point Action, while Schweikert emphasizes pro-business conservatism. The primary also determines nominees for secretary of state and attorney general, critical roles in a state pivotal to Trump's 2020 election efforts.

The race for the 1st Congressional District features incumbent Ed Case highlighting his congressional work and Jarrett Keohokalole attempting to create buzz for an upset. Their contrasting campaign approaches define the election.

Melat Kiros defeated Rep. Diana DeGette in Denver's 1st Congressional District primary with 53.2% of the vote, winning precincts across city center, west, and north Denver. Voter turnout in Denver's 2026 primary reached 40% of active voters, higher than 2024 and 2022 but similar to 2018. Phil Weiser won Denver's gubernatorial primary with 66% of the vote, while state Sen. Barbara Kirkmeyer led Republican primary support in Denver with 51%.

The Democratic Socialists of America (DSA) is targeting Colorado primaries following recent victories in New York. DSA-backed Melat Kiros is challenging Democratic Rep. Diana DeGette in Colorado's 1st Congressional District, with Justice Democrats also supporting Kiros. The primary is part of a broader effort by far-left candidates to challenge Democratic Party establishment figures.

Congresswoman Diana DeGette, who has represented Denver's 1st Congressional District for nearly 30 years, faces challenges from two Democratic candidates, Melat Kiros and Wanda James, in the June 30 primary. Republican Christy Peterson is unopposed in her party's primary, focusing on issues like public safety and manufacturing. Kiros emphasizes systemic change and community-driven governance, while DeGette remains a long-standing figure in Colorado politics.

Missouri voters approved a 2016 constitutional amendment banning new sales taxes on most services, but under proposed Amendment 4, it would have failed due to not securing a majority in each of Missouri's eight congressional districts. The 2016 measure passed statewide with 57% support but lost in the 1st Congressional District, meaning Amendment 4 would have blocked it and similar citizen-led initiatives.

Voters in South Carolina are casting ballots in House primary elections with two open seats. Reps. Nancy Mace of the 1st Congressional District and Ralph Norman of the 5th Congressional District are running for governor, leaving their seats vacant. Polls close at 7 p.m. EDT, with Decision Desk HQ providing live updates.

James Gallagher won a special election to claim a House seat in California's 1st Congressional District, boosting the GOP majority. He was endorsed by President Trump.

Montana voters are participating in the 2026 House primary elections. The 1st Congressional District is open due to Rep. Ryan Zinke retiring, with Democrats considering it a key target despite its red leanings. Troy Downing, a Republican, is running for reelection in the 2nd Congressional District.

Bucks County Commissioner Bob Harvie won the Democratic primary for Pennsylvania’s 1st Congressional District, defeating mathematician Lucia Simonelli. He will challenge five-term Republican U.S. Rep. Brian Fitzpatrick in the general election. The race was called by the Associated Press shortly after polls closed.

Republican Phil Berger, a Trump-endorsed North Carolina Senate leader, lost his primary election by 23 votes to Sheriff Sam Page. The close race highlights a rare setback for Trump's endorsement in a Republican-leaning district, creating a power vacuum in state politics.