If you were cooking up a candidate in a lab to take on Donald Trump, you might come up with someone a lot like Senator Cory Booker of New Jersey. (Well, except for the unmarried vegan part.) Like Pete Buttigieg, Booker was a Rhodes scholar and the dynamic mayor of a city afflicted by industrial decline, and unlike Buttigieg, he’d be sure to increase African-American turnout. He’s more talented than Joe Biden or Beto O’Rourke at summoning an inspiring and unifying civic gospel. His criminal-justice record is better than Kamala Harris’s. He is near the top of Greenpeace’s ranking of Democratic presidential candidates on environmental issues, behind only Jay Inslee and Kirsten Gillibrand.

Hell, he was even a reality TV star, albeit of the prestige type; his mayoral exploits were chronicled in the award-winning 2009 documentary series “Brick City.” He once ran into a burning building and carried a woman out over his shoulder. Long before Donald Trump, he was known for his innovative use of Twitter, responding to his Newark constituents’ complaints about things like potholes and snow removal. (In 2010, Time magazine called him a “social-media superhero.”) He looks like a movie star, and is dating one, the former Bernie Sanders surrogate Rosario Dawson. Booker is often mocked for showboating, but his ebullient theatrical streak would be useful in running against a carnival barker who is, as Marianne Williamson said on Tuesday, channeling a dark psychic force.

After Booker’s skillful performance on Wednesday, a CNN focus group and a flash poll of activists from the progressive group Indivisible both found him to be the night’s winner. That makes him, along with Elizabeth Warren, one of only two candidates who is widely viewed as shining in both the June and July Democratic debates. His sparring with Biden was particularly impressive; he was able to simultaneously make the case against the party’s front-runner and maintain a posture of optimistic, intraparty comity.

It’s a bit of mystery, then, why he’s yet to break into the top tier of 2020 Democratic contenders.

[Listen to “The Argument” podcast every Thursday morning, with Ross Douthat, Michelle Goldberg and David Leonhardt.]