We knew Bernie Sanders would win the New Hampshire primary; he’s been leading there since the beginning of polling, and if you’re worried about Hillary Clinton getting drubbed, she still has the rest of the primary field to run, including Super Tuesday in March.

As for the Republicans, Ohio Gov. John Kasich pulled out a second, ahead of Ted Cruz, Jeb Bush, and Marco Rubio, in that order with one percentage point between Cruz and Rubio making up the difference.  The rest of the field is pretty much in the dust.

But it was Donald Trump who will tell you he won the night, and he did.  And I agree with Ezra Klein: that should scare the crap out of America.

Trump is the most dangerous major candidate for president in memory. He pairs terrible ideas with an alarming temperament; he’s a racist, a sexist, and a demagogue, but he’s also a narcissist, a bully, and a dilettante. He lies so constantly and so fluently that it’s hard to know if he even realizes he’s lying. He delights in schoolyard taunts and luxuriates in backlash.

Trump is in serious contention to win the Republican presidential nomination. His triumph in a general election is unlikely but it is far from impossible. He’s not a joke and he’s not a clown. He’s a man who could soon be making decisions of war and peace, who would decide which regulations are enforced and which are lifted, who would be responsible for nominating Supreme Court Justices and representing America in the community of nations. This is not political entertainment. This is politics.

Trump’s path to power has been unnerving. His business is licensing out his own name as a symbol of opulence. He has endured bankruptcies and scandal by bragging his way out of them. He rose to prominence in the Republican Party as a leader of the birther movement. He climbed to the top of the polls in this election by calling Mexicans rapists and killers. He defended a poor debate performance by accusing Megyn Kelly of being on her period. He responded to rival Ted Cruz’s surge by calling for a travel ban on Muslims. When two of his supporters attacked a homeless man and said they did it because “Donald Trump was right, all these illegals need to be deported,” he brushed off complaints that he’s inspiring violence by saying his supporters are “very passionate.”

Behind Trump’s success is an unerring instinct for harnessing anger, resentment, and fear. His view of the economy is entirely zero-sum — for Americans to win, others must lose. “We’re going to make America great again,” he said in his New Hampshire victory speech, “but we’re going to do it the old fashioned way. We’re going to beat China, Japan, beat Mexico at trade. We’re going to beat all of these countries that are taking so much of our money away from us on a daily basis. It’s not going to happen anymore.”

Trump answers America’s rage with more rage. As the journalist Molly Ball observed, “All the other candidates say ‘Americans are angry, and I understand.’ Trump says, ‘I’M angry.'” Trump doesn’t offer solutions so much as he offers villains. His message isn’t so much that he’ll help you as he’ll hurt them.

[…]

Trump lives by the reality-television trope that he’s not here to make friends. But the reason reality-television villains always say they’re not there to make friends is because it sets them apart, makes them unpredictable and fun to watch. “I’m not here to make friends” is another way of saying “I’m not bound by the social conventions of normal people.” The rest of us are here to make friends, and it makes us boring, gentle, kind.

This, more than his ideology, is why Trump genuinely scares me. There are places where I think Trump’s instincts are an improvement on the Republican field. He seems more dovish than neoconservatives like Marco Rubio, and less dismissive of the social safety net than libertarians like Rand Paul. But those candidates are checked by institutions and incentives that hold no sway over Trump; his temperament is so immature, his narcissism so clear, his political base so unique, his reactions so strange, that I honestly have no idea what he would do — or what he wouldn’t do.

When MSNBC’s Joe Scarborough asked Trump about his affection for Vladimir Putin, who “kills journalists, political opponents and invades countries,” Trump replied, “He’s running his country, and at least he’s a leader, unlike what we have in this country.” Later, he clarified that he doesn’t actually condone killing journalists, but, he warned the crowd, “I do hate them.”

It’s a lie that if you put a frog into a pot of water and slowly turn up the heat the frog will simply boil, but it’s a fact that if you put the American political system in a room with Trump for long enough we slowly lose track of how noxious he is, or we at least run out of ways to keep repeating it.

But tonight is a night to repeat it. There is something scary in Donald Trump. We should fear his rise.

We’ve heard this madness before, and at the risk of going full-on Godwin, it’s been from grainy black and white newsreels with banners flying and goosesteps.  The joke is long over.