I'm an Idahoan, so this take might be wildly insular, but I think that Republicans in western states (like Colorado and Utah) are still able to put forward candidates that are conservative enough to ward off Trumpian (typically newcomer) candidates with anti-democratic tendencies, armed with conservative bona fides that still serve what Trumpian conservatism feeds, like anti-establishment, anti-authority authenticity. But it is of a frontier flavor that I think Trump and many Trumpy candidates don't have.

—Meredith Conroy, 538 contributor

It's not exactly breaking news that Trump has a strong hold over the GOP. But if you look at the three cases where his endorsees lost tonight, each pick had potential challenges, either because of their own weaknesses as candidates or strong candidates running against them. In South Carolina's 3rd District, Mark Burns had a controversial past that invited outside spending to help his opponent, and Burns also barely raised any money from donors, mostly self-funding his bid with loans. In Colorado's 5th District, Dave Williams had rubbed a lot of people the wrong way as state party chair, to the extent that outside groups spent more than $2.6 million against him or on behalf of his main primary opponent. And Trump doesn't have as firm a hold over GOP politics in Utah, indicative of how his endorsee, Trent Staggs, couldn't beat out the establishment choice in Rep. John Curtis, who had a stronger track record as an incumbent congressman and received a ton of outside support.

—Geoffrey Skelley, 538

Trump made some ill-advised endorsements in today's races, and it feels to me like they were based more on his own personal taste rather than any kind of strategy. Williams in Colorado’s 5th District has been very outspoken, he’s an election denier, he’s made controversial, identity politics stands as the state GOP chair, and it could just be that Trump liked his MAGAness or the fact that he seized control of the state party in the way he did. I doubt his team would have chosen Williams as the endorsee, I suspect this was all Trump, and a similar scenario may have happened with Staggs and Burns.

—Kaleigh Rogers, 538

Going into tonight, Trump had only endorsed one candidate for Senate, House or governor who lost. Tonight alone, he endorsed three. Why do you guys think Trump failed so badly tonight? Was it just bad luck, or something real?

—Nathaniel Rakich, 538

Utah may be safely Republican, but the MAGA faction of the party is looking to pick up seats from the traditional Republican faction in Tuesday's primaries. And the biggest prize of all is the state's open U.S. Senate seat, currently held by anti-Trump Sen. Mitt Romney.

The front-runner to replace Romney is Rep. John Curtis, whose temperament — and attitude toward Trump — are closest to Romney's. Although he hasn't taken a high-profile stand against Trump like voting for impeachment, Curtis declined to endorse Trump during this year's presidential primaries and has avoided commenting on Trump's legal issues. Another tell: Though Romney hasn't made an endorsement, much of the incumbent's political operation is behind Curtis, who is known on Capitol Hill for being the rare Republican to talk about climate change and for owning 300 pairs of quirky dress socks.

Curtis faces three opponents who are, to varying degrees, more enthusiastic about Trump. Former state House Speaker Brad Wilson has raised the most money ($2.0 million from donors, $3.0 million from himself), but his efforts to strike a happy medium between moderate and MAGA (he introduced a resolution to pay tribute to Trump shortly after his second impeachment but also blocked an effort to censure Romney for voting to convict; he endorsed Trump for president, but only after Florida Gov. Ron DeSantis dropped out) may end up pleasing no one. Meanwhile, businessman Jason Walton has vocally defended Trump and is well funded thanks to a $2.5 million loan to his own campaign, but Trump himself opted to support underfunded Riverton Mayor Trent Staggs instead.

That surprising endorsement may have cost MAGA Republicans their best shot at defeating Curtis. Not only has Curtis raised $3.8 million on his own, but outside groups largely funded by moderate Republican donors have spent a whopping $9.6 million to help him or hurt Staggs. As a result, a [June 4-6 poll from HarrisX/the Deseret News/the University of Utah]) put Curtis at 47 percent support, with Wilson (24 percent), Staggs (21 percent) and Walton (8 percent) well behind.

—Nathaniel Rakich, 538