Sebastian Gorka, late of the Trump Administration, stood before the annual gathering of the Conservative Political Action Conference last week and made plain the inner frenzy of a party that must place its hopes for 2020 on a President who had just been described before a congressional committee as “a racist,” “a con man,” and “a cheat.” Hence the rhetorical smoke bombs. Wild-eyed Democrats are coming! Gorka declared, “They want to take your pickup truck! They want to rebuild your home! They want to take away your hamburgers! This is what Stalin dreamt about but never achieved!”

The Stalinist nightmare that Gorka had on his mind is the Green New Deal, a still rough proposal that calls on the U.S. government to come to the belated rescue of the planet with the same sense of urgency that it displayed in rescuing the economy during the Great Depression. To Gorka, such a proposal is a communist “watermelon”: “green on the outside, deep, deep red communist on the inside.”

The President, who dismisses climate change as “a Chinese hoax,” also waxed derisive at CPAC. “New Green Deal or whatever they hell they call it . . . I encourage it,” he said caustically, in a sweaty, two-hour rant on Saturday. “I think it’s really something Democrats should promote. . . . No planes! No energy! When the wind stops blowing, that’s the end of your electric. ‘Darling, is the wind blowing today? I’d like to watch television, darling.’ ”

The focus of this fear campaign, the nexus of all danger, is a member of Congress who has been in office for two months: Alexandria Ocasio-Cortez, who, at twenty-nine, represents parts of the Bronx and Queens. With Senator Ed Markey, a Democrat from Massachusetts, she is a co-sponsor of the Green New Deal. Because she questions our habits of fossil-fuel consumption and industrial agriculture, her opponents reason, she can’t possibly be trying to head off global catastrophe. She just wants to steal your Chevy Colorado and your Big Mac.

“Apparently, I am a cow dictator,” Ocasio-Cortez told me. “What’s humorous to me is that we’re finally proposing a clear, ambitious, but necessary and grounded policy on the scale of the problem. And so it’s hard for the Republicans to refute the actual policy on its substance. They resort to mythologizing it on a ludicrous level. Ted Cruz says we want to ‘kill all the cows.’ How far have we slid in our discourse? But that’s what half our political representation is up to.”

Ocasio-Cortez upset a veteran of her own party in a primary race, and came to office as an unabashed idealist. The mocking attacks have been a constant on the right ever since. There are phony memes about her clothes, her makeup, her intellect, her boyfriend, her apartment building, her childhood, her high school, her relatives, her old nickname, her dance routine from her days at Boston University. There is a creepy dimension to some of them. A nude selfie made its way through social media—until it was unmasked as a fraud.

Members of the Republican caucus have been no more welcoming. As Ocasio-Cortez rose to cast her vote for Nancy Pelosi as House Speaker, Republicans booed. In the cartoon being painted of her, Ocasio-Cortez is both ideologically monstrous and intellectually limited. “Every time she opens her mouth, I think she’s kidding,” Jerry Falwell, Jr., the evangelical leader and president of Liberty University, told the delegates at CPAC. Ed Rollins, an old Reagan adviser who appears frequently on Fox News, referred to her as a “little girl.” On Fox, mispronouncing “Ocasio-Cortez” is considered hilarious.

“It feels like an extra job,” she said of the attacks. “I’ve got a full-time job in Congress and then I moonlight as America’s greatest villain, or as the new hope. And it’s pretty tiring. I’m just a normal person. I knew that I was not going to be liked. I’m a Democrat. I’m a woman. I’m a young woman. A Latina. And I’m a liberal, a D.S.A. member,” she said, referring to the Democratic Socialists of America. “I believe health care is a right and people should be paid enough to live. Those are offensive values to them. But this ravenous hysteria—it’s really getting to a level that is kind of out of control. It’s dangerous and even scary. I have days when it seems some people want to stoke just enough of it to have just enough plausible deniability if something happens to me.”

The Trump family has attacked her from the start. Because she had the D.S.A.’s endorsement, last December, Donald Trump, Jr., posted a joke on Instagram about how in socialist countries people eat their dogs rather than walk them. (“It’s funny cuz it’s true!!!” he wrote.) Ocasio-Cortez’s office had no comment, but she did, tweeting, “Please, keep it coming Jr—it’s definitely a ‘very, very large brain’ idea to troll a member of a body that will have subpoena power in a month.”

In fact, last week, in her first major appearance as a member of the House Committee on Oversight and Reform, Ocasio-Cortez approached the job of interrogating Michael Cohen with care. Republicans have accused her of being a knowledge-lite performer whose only talent is a mastery of Twitter. But, while most of the Republican committee members and even a few Democrats put on laughably self-regarding performances, Ocasio-Cortez followed a line of questioning that helped tease out important facts and responses from Cohen. Thanks in part to that exchange, we can expect to hear from some essential characters from Trump Tower, Misters Weisselberg and Calamari.

Ocasio-Cortez says that she has tried to keep her focus partly by avoiding watching Trump on television: “He relies and thrives on attention, and so the less attention he’s given, even if it’s just one set of eyeballs, the weaker he is.” She said that watching Trump in the House chamber at the State of the Union address made her feel “sick” and “underwhelmed.”

“He is such a small, mediocre person,” she told me. “I grew up with a real romanticism about America. I grew up in a first-generation household where your parents give up everything, and for me America was the greatest thing ever to exist. To be there on the floor of the House was beyond anything my parents would have ever dreamed of. But the person behind the podium was so unskilled. It was kind of sad.”

Ocasio-Cortez has proposed a set of left-leaning ideas: Medicare for All, a seventy-per-cent tax rate on income above ten million dollars, a guaranteed living wage. At first, she seemed to unnerve Democratic leaders. She supported and appeared at a sit-in outside Nancy Pelosi’s office with an environmental group, the Sunrise Movement. Pelosi was unamused and later referred dismissively to the Green New Deal as a “dream.”

But that was weeks ago. Pelosi has found a modus operandi with Ocasio-Cortez, and posed with her (along with Representives Jahana Hayes and Ilhan Omar) for the cover of Rolling Stone. The idea of a Green New Deal has won endorsement from Democratic Presidential candidates (Harris, Warren, Sanders, Booker, Klobuchar, Gillibrand, Inslee) and a growing number of senators and congressmen. Of course, it is not entirely clear, in detailed legislative terms, what exactly they are endorsing. In general, the idea is to pour government money into transforming the economy in ways that might head off the worst of climate change. At this point, the most salient feature of the proposal is a sense of urgency, its conversation-changing radicalism.