Politicians are power mongers, remember that.  I really couldn't see Hilary Clinton (or any of them for that matter),  lining up with the rest of the slobs at the airport, getting abused by United or some other airline, purchasing her little "snack" once on board and then, arriving late to wherever because of the customary flight delays of most major airlines. 

I think it would do her some good to maybe fly Southwest, where there are no seat assignments....