i want to congratulate boris johnson on a terrific victory. i think that might be a harbinger of what's to come in our country. it was last time. >> boris johnson's win in the uk is prompting some warnings from democrats here in the u.s. nbc news put it this way today. democratic hopeful joe biden seemed to try and draw lessons from the left-wing labour party's loss for his upcoming party prime. quote, you're also going to see people saying, my god, boris johnson, who is kind of a physical and emotional clone of the president, is able to win, biden said. and as axios put it today, johnson's win is a reminder that mainstream voters hesitate to embrace radical change, and voters who are uneasy about an incumbent won't necessarily choose the opposition party if