I'm sorry to be stupid, but I don't understand what you mean when you say: "because there's no way they can primary Donald Trump". Could you kindly explain for a bear of very little brain, please? Thank you.
Not stupid at all! I was speaking in opaque shorthand.
In order to be the Republican nominee for president, they would have to win the primary election (where the candidates for each party run against each other). There's no way that, for example, Ted Cruz is going to win a primary against Donald Trump.
The reason this is delicious is because most of the figures who have been following Donald Trump so sycophantically have been doing so because they want to gain his followers. They know Donald Trump is a danger to the republic, but they're willing to kiss his arse in exchange for the chance to have his base follow them when they run in 2024.
But if Trump runs in 2024, that deal-with-the-devil is going to blow up in their faces. They can run in 2028, sure, but by then who knows what the country will look like, if they'll still have name recognition, etc.
["To primary" someone usually means to run against an incumbent in the primary elections. Trump, for example, keeps Republicans in line by threatening to endorse a different Republican candidate in the primary elections. Trump won't actually be the incumbent in 2024, so saying "they can't primary Donald Trump" was very sloppy of me! What I really meant to say is that there's no way they can win in a primary campaign against him--or, at least, that it will be very hard. The Republican party has become a cult of personality, not a political party.]