What Tucker believes in the privacy of his own home doesn't really matter
“What he’s good at is destroying things. He’s the undisputed world champion of that. He could easily destroy us if we play it wrong.”
Such a statement is flattery to Trump's ears. In fact this whole FOXNews kerfuffle has only enhanced Trump's sense of power and all the better because they have bent to his will against their own.
In the end Trump doesn't care how anyone feels about him personally as long as they don't say so in public and as long as they have transactional value to Trump. As evidenced by his relationships to Christie, Rubio, Lindsey Graham, etc. who at one point or another were critics but retain utility and so Trump overlooks their past as long as they keep kissing his ass long and hard.
Trump's response to Christies' exploratory campaign has been so--- well, absent. He doesn't see Christie as a threat.