In a recent television interview, Trump said that even those things, he claimed during his campaign that were not factual, were validated by his election.
One might wonder, then, why he would entertain nominating Mitt Romney, as Secretary of State, after having called him a "loser" and a "choker".
In my opinion. like the young bully who pulls the wings off captive insects, Trump wants to savor seeing Romney grovelling before him for a job that he would dearly love. If he enjoys it, bigly, Trump might even give it to Mitt so that he can watch the grovelling on a regular basis.