Trump stuck the pins in Hillary pretty hard there at the end of that dinner, to a lot of booing from the crowd. She returned the favor. I don't think there is any love lost there. As far as I'm concerned, Trump is in it to win it. Yeah, I have my moments of doubt also, lately, that they have put forward a populist candidate so they could lock it up with the electoral college "protecting the citizenry from themselves". We know from leaked emails that Trump was on the short list with Carson and Cruz for candidates they felt they could win against. However, I'm counting on Trump's ego, to be frank. If he was just messing around, intending to pull a Perot maneuver, I doubt he would be going at it as hard as he is.