This is 100% false.
Trump didn't even publicly endorse the Republican until several days before the election -- and it was a muted endorsement at best.
Trump knew damn well that the guy was going to lose ... and as I've posted here many times in the past, Trump simply does not like to endorse losers even if they are perfect MAGA candidates.
Reading is hard
That’s BS. Trump endorsed Cameron in the primary and later in the general. If Cameron was a loser he’s DJT’s loser.