During the presidential campaign there has been some discussion of a provision in federal law (18 U.S.C. § 599) that bars candidates from promising jobs to garner support. I’m not clear whether this provision applies to presidential candidates, but if it does I’m not sure why it should.
History is replete with situations where presidential candidates did exactly this to either get the nomination or win an election. John Quincy Adams and Henry Clay in 1825 (Secretary of State), Dwight D. Eisenhower and Earl Warren in 1952 (the Supreme Court), and candidates who offered the vice-presidency to win over convention delegates for support. (Ronald Reagan, for example, in 1976). I don’t see why any of this should be a crime.
While I’m on the subject, I think it would be great if candidates would name some key Cabinet members in advance, much as you see a “shadow Cabinet” in parliamentary countries.