Liberal Late Show host Stephen Colbert has no problem trashing conservatives and Republicans in the nastiest manner. But when hard-left Democratic Senator Kamala Harris appeared on his show, Thursday, he turned into an excited fan boy. Discussing the California politician’s new book, Colbert gushed, “What makes you happy? Where does your hope come from?”

The host pushed Harris on a possible presidential run, wondering, “Many people who put out books two years before a presidential election do so to introduce themselves in a broad way to the American people.... Are you going to run for president?”

After responding, “I might,” Harris dissolved into a weird fit of laughter.

Colbert closed by prodding the possible 2020 contender to come back: “Please join us again when you may run for president.”

In a past episode, the host called God a socialist while praising Alexandria Ocasio-Cortez. In December, he lobbied for gun control. That same month, while referring to alleged sexual predator Les Moonves, the former CEO of CBS, Colbert snapped that he would “still be better than Trump.”

A partial transcript is below: