DJT values loyalty above all else and while he might have appreciated Haley at UN, her saying she wouldn’t run if he did, then running - i think that knocks her off the list even if she did give him a ‘heads-up.’ and in that snake pit called DC, he doesn;t need one in his inner circle.
Trump can select the best people in the history of the human race to work for him in a second administration. He’d be lucky to find more than a half-dozen of them who would be willing to interrupt their successful lives to work in the U.S. government for several months to several years.