John Moolenaar of Michigan. In an R+32 district, Trump endorsed an incumbent with a 58% conservative rating....link attached....
https://libertyscore.conservativereview.com/john-moolenaar
Lots of horrible picks. It’s easy to have a good win/loss record when you pick a sure thing and don’t fight the swamp. He in no way supported grass roots candidates with limited resources. So he gets a win for Huizenga who was unopposed against Upton, Moolenaar running against the sitting Michigan Conservative Union President Tom Norton (Afghanistan combat vet), and a win for Bergman who was unopposed and has a rating worse than Moolenaar. That’s just Michigan.
Except he did.
When President Trump picked Harriet Hageman, she had no resources and was an underdog to the incumbent Liz Cheney,
Hageman went on to CRUSH Liz Cheney by a massive close to 40% with President Trump's support.