I would have said attention buys elections, and Trump was the kind of candidate that had the media tripping over themselves to give him free coverage. That definitely seems to explain the primary season, but the general election campaign turned things around a bit by consisting almost solely of negative attention that hurt the candidates when they were in the spotlight. I guess neither candidate could spend enough to buy anywhere near as much attention as the various scandals attracted, and perhaps this campaign season was meaningfully different in overall tone.