Now that Boris Johnson has withdrawn from the race for Prime Minister, he's free to become Trump's Vice Presidential pick. #BoJo
It won't happen, of course. Those two egos are much too big for one ticket. It's pretty much the opposite of ticket balancing: two rich brash loudmouths from New York, one from Queens and one from Manhattan. Finally, putting those two hairdos together? Probably cause some tonsorial black hole, if the egos didn't.
(There are many articles about how Johnson's claims he'll renounce his American citizenship, but not one confirming he actually has. See this comment. Until it's a matter of public record I think we can file that with all his other questionable statements.)