But I'm Sure They Would Be OK with Him Defending Al Qaeda Terrorists

"To many Democrats and professors at Harvard, Mr. Tribe is a traitor."

Says this NYT article, "Laurence Tribe Fights Climate Case Against Star Pupil From Harvard, President Obama":

“The administration’s climate rule is far from perfect, but sweeping assertions of unconstitutionality are baseless,” Jody Freeman, director of the environmental law program at Harvard Law School, and Richard Lazarus, an expert in environmental law who has argued over a dozen cases before the Supreme Court, wrote in a rebuttal to Mr. Tribe’s brief on the Harvard Law School website. “Were Professor Tribe’s name not attached to them, no one would take them seriously.”...
[A] number of legal scholars and current and former members of the Obama administration say that Mr. Tribe has eroded his credibility by using his platform as a scholar to promote a corporate agenda — specifically, the mining and burning of coal.
“Whether he intended it or not, Tribe has been weaponized by the Republican Party in an orchestrated takedown of the president’s climate plan,” said one former administration official.

Tribe says that he's "very comfortable" representing Peabody Energy, because the arguments he needs to make "happened to coincide with what I believe." The NYT provides a quote to cast doubt on Tribe's veracity...

Of course they do because they can't believe an intelligent, thoughtful, honest lawyer could really side against them on the climate battle. Something about you can't reason a person out of a position they didn't arrive at by reason in the first place. If you read the entire NYT article, you will find no references to actual legal arguments regarding the constitutionality of Obama's climate policy, or even any reasoned arguments about the soundness of climate science. It's really just a tribal response.

The Republicans who are citing Mr. Tribe’s work are not surprised. Mr. McKenna, the Republican lobbyist, said dryly, “He’s about to be banned from a lot of cocktail parties.”

Oh, you poor man, now the only friends you'll have are friends nobody wants.

He might even have to learn to drink beer instead.