With nearly half of the vote reporting in Colorado's 3rd and 8th Congressional Districts, mainline Republican candidates Jeff Hurd and Gabe Evans have pulled ahead of the competition. Evans is endorsed by both Trump and the conservative activist organization Americans for Prosperity, funded by the influential Republican Koch brothers, so no surprises here really. Hurd's race was closer though. Going into the night he had a clear fundraising advantage and the support of several "normie" Republican organizations — like the national cattleman's association and the association of automobile dealers. A victory for Hurd (which looks likely, but there's quite a few rural votes left to be counted) would be a defeat for the other MAGA-aligned candidates in the race — such as Ron Hanks, who has previously called himself a "pro-Trump warrior".

—G. Elliott Morris, 538

In perhaps the highest-profile race of the evening, Latimer leads Bowman 56 percent to 44 percent in the Democratic primary for New York's 16th District, with a little more than a quarter of the overall expected vote reporting, per the AP. Bowman is running up huge numbers in the small part of the district that's in the Bronx — he leads 84 percent to 16 percent there — but about nine-tenths of the district's population lives in Westchester County, where Latimer currently leads 69 percent to 31 percent.

—Geoffrey Skelley, 538

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

Trump has endorsed 18 candidates in Republican primaries tonight, though 12 are incumbents. Trump's track record of picking winners has been very strong this primary season — so far, only one candidate he endorsed for Congress or governor races has lost her primary: Mendham Mayor Christine Serrano Glassner in New Jersey's Senate race. But Trump often pads his numbers by endorsing candidates who are locks to win, and tonight he's made a few riskier calls that might lower his batting average.

Consider Colorado's 5th District, around Colorado Springs in the middle of the state. In the race to replace Lamborn, Trump has endorsed Williams over Crank. As I wrote earlier, Crank has the backing of traditional GOP groups that have spent millions opposing Williams, so Trump may have his money on the dark horse in this race.

A similar showdown is happening in Utah for Romney's seat. Trump is backing Staggs, but Curtis seems favored to win the GOP nomination.

I'll be tracking all of these races, and more, tonight to see where Trump's endorsement track record lands.

—Kaleigh Rogers, 538