his heights. earlier he made remarks about bor boris johnson the front runner for foreign minister. >> he's been a friend of mine. he's been very nice. i have a very good relationship with him. i have a very good relationship with nigel farage, with many people over there. we'll see what happens. >> president trump in this spat with the london mayor after kahn, after kahn called him a global threat. >> i don't think much of him. i think that he's the twin of de blasio, except shorter. >> and then just moments ago reiterating that insult via twitter. oh, now i'm landing, so he's obviously on the twitter. the doors are open on air force one. we expect him to be coming down any moment. let's go to buckingham palace, let's bring in cnn's nic