Greg Lopez, the Republican nominee in the special election in Colorado’s 4th District (to fill Rep. Buck's vacant seat), is well ahead with about two-thirds of the vote counted so far. According to the AP, he leads Democrat Trisha Calvarese, 55-38 percent. That 17-point margin is roughly in line with how the district voted in the last presidential election (for Trump by 19 points).

—Jacob Rubashkin, Inside Elections

Perhaps uniquely among states that have held their primaries so far, Colorado voters are particularly concerned with on housing, according to a March poll from New Bridge Strategy/Aspect Strategic/The Colorado Polling Institute. Asked in an open-ended question to name the most important issue for the state government to address, 23 percent of likely voters in the state named homelessness, housing affordability or lack of housing — more than any other issue area. Twenty-one percent named issues related to the economy, including taxes, the cost of living, jobs and inflation. Fourteen percent named issues related to immigration. No other issues were named by more than 6 percent of respondents.

—Mary Radcliffe, 538

The AP projects that Biggs has defeated Burns in the GOP runoff in South Carolina's 3rd District. With more than 95 percent of the expected vote reporting, she leads 51.1 percent to 48.9 percent — what looks to be a narrow win. This is a somewhat surprising result: Trump had endorsed Burns, who led in the initial primary vote on June 11 and even had an endorsement from the third-place finisher.

But Biggs may have triumphed thanks to more than $500,000 in outside help from two conservative super PACs that have been spending against more anti-establishment candidates in GOP primaries like Burns. Per FEC data, Conservatives for American Excellence and America Leads Action spent mostly against Burns but also made some outlays to support Biggs.

—Geoffrey Skelley, 538

With 24 percent of the expected vote in, Mannion is leading Hood in the Democratic primary in the 22nd Congressional District, 60 percent to 40 percent, according to the AP. Hood had hoped to position herself to Mannion's left on issues like abortion and has a fundraising advantage, as Geoffrey wrote earlier. But Mannion, a state Senator, is a well-known entity in much of the district.

—Monica Potts, 538

After coming within 600 votes of losing her seat in the 2022 midterm election and enduring an awful year in her personal life, Colorado Rep. Lauren Boebert has ditched her district to attempt to win over Republican voters on the other side of the state, in the 4th District. This seat, which was previously held by Republican Rep. Ken Buck — who resigned earlier this year after announcing his retirement last year — is more reliably red, having gone for Trump by a margin of 19 percentage points in 2020 (compared to an 8-point margin in the 3rd). So if Boebert can secure the GOP nomination, she'll all but guarantee herself a spot in the next Congress.

Standing in her way are some primary candidates with more local cachet, such as former state Sen. Jerry Sonnenberg and Deborah Flora, a former Miss Colorado and local talk radio host. However, Boebert has a major fundraising advantage (she's raised $3.7 million, compared to the next-highest raiser, Flora, who's raised less than half a million), as well as Trump's endorsement, and the sole poll we have for this race shows her up 35 percentage points. So she's definitely got a solid shot at the primary in her new district.

In addition to the race to fill this seat in the 119th Congress, there is a separate special election to see out Buck's term. Republicans are favored to win that race.

—Kaleigh Rogers, 538