Answer: Poor judgement plus outside help
Nathaniel, I think these were Trump’s riskiest set of endorsements so far. All three candidates had some serious weaknesses and they were running against credible alternatives. However, one thing I think is notable is that outside groups had no issue spending heavily against these particular Trump-backed candidates.
In South Carolina, Burns was on the receiving end of several hundred thousand dollars in independent expenditures from groups bankrolled by deep-pocketed GOP donors. Those same groups also spent against Dave Williams in Colorado. And in Utah? Well, Utah is among the least Trump-friendly of the heavily Republican states, and rather than back the more established conservative horse in the race, Brad Wilson, Trump looked further afield. And there was a lot of outside spending to back Curtis as well, while Staggs got little help.
—Jacob Rubashkin, Inside Elections