I think it was more likely that he promised her a seat on the U.S. Supreme Court
“Ya know, Hillary and Ah think you’d be a stellar Supreme Court Justice one day. You’re doing a tremendous job as Attorney General now and there’s no reason to think why you shouldn’t be a Justice later, too. And if she has anything to say about it, it’d be sooner rather than later. (Poor Justice Scalia!) But Ah absolutely shudder to think who that windbag Trump might have in mind, don’t you?”