Trump wasn't grimacing as you stated, Melania was. Trump was smiling ear to ear because that's the response he wanted. Why? Because when it comes to the land of the swamp he wanted people to see exactly what he was up against.

This is a place that went ninety percent for Hillary, Trump I think managed four percent, without having to look it up don't quote me on it but it was marginal. A town full of politicians, reporters, lobbyist so it comes as no surprise at all that they booed him and chanted locked him up.

Trump is a smart man and he plays his cards well, there isn't much he doesn't do for a reason. You may want to listen to that again, as I did a couple times, but there's a marginal part of that crowd who did cheer....but that wasn't what he was after and that's not why he was smiling ear to ear.