One of the first things people who know Mitt Romney tell reporters is how delightfully personable and funny he is. This is spin, of course, but it also appears to be an actual surprising secret his intimates want out. Romney is one of those guys who generally has a tough time being personable with strangers, and on the campaign he has the annoying tic of walking back spontaneous jokes as he tells them, as if he is afraid that he might offend. Which brings us to Tuesday night’s Tonight Show, where Romney certainly had his moments. Not quite Louis C.K., but a long way from Lurch. Who can deny that Trump is huge?