Boris Johnson is what you would get if U.S. President Donald Trump had been educated at Eton and Oxford. Trump's shtick would fail as badly in Britain as Johnson's would in the United States, but questions of style aside, the two men are almost identical — and, if Tuesday's vote goes as expected, Johnson becomes the prime minister of the United Kingdom this week.

Both men are constant, shameless liars. They are both what the experts call "sociopaths": superficially charming, highly manipulative men who accumulate numerous wives, girlfriends and children as they go through life, but never really engage with anybody. And neither of them has any real purpose in politics.

What Trump and Johnson both conspicuously lack is set of objectives that goes beyond merely winning and keeping power. Trump's determination to expunge every trace of President Barack Obama's legacy (health care, the Iran deal, etc.) gives him a kind of agenda, but an entirely negative one. Johnson doesn't even have that. His only role in British politics is to save the Conservative Party by "delivering" Brexit.