Yes. He should suffer consequences, but again, I don't know what the LAW is.
By the way, did you see what Trumpty told the Irish prime minister? He advised him to build a wall between Ireland and Northern Island.
He is SO FUCKING STUPID!! Really, the PM should have just stood up and walked out. I'm sure that's what he felt like doing. But Trump is the US president, and there could be consequences. I'm sure nearly every leader in Europe would like to walk out on the moron. Probably they fantasize about it.
Once he's out of office--and one hopes he won't have started WWIII by then--I very much doubt he'll receive an official welcome in ANY European country. Or in much of the rest of the world.