Noam Chomsky is in the news this week because of his latest interview with Al-Jazeera’s UpFront, which is set to air on Friday. But Chomsky, who is regarded by some as one of America’s foremost leftist intellectuals, isn’t discussing the “horrors” of U.S. foreign policy, as he normally might. This time, he’s advising that people vote Democratic in the upcoming presidential election, including even for that pillar of establishment politics, Hillary Clinton.

In the interview, Chomsky cites what he calls “enormous differences” between the two parties, especially on the issue of climate change. “I’ve always counseled strategic voting,” he says, “Meaning, in a swing state… if there’s a significant enough difference to matter, vote for the better candidate—or sometimes the least bad.” Republicans, who are either “climate change deniers or…skeptic[s] who [say] we can’t do it” pose a “serious danger to human survival,” Chomsky says. His solution? Vote Hillary!