Beto O'Rouke has only been in the 2020 presidential race for a little more than a month, but Ben Shapiro thinks the former Texas congressman's campaign is already "toast."

On "Tucker Carlson Tonight" Wednesday, Shapiro, a conservative commentator and author of the new book "The Right Side of History," said that O'Rourke may have gotten extensive media attention after entering the race, but that attention has since been usurped by Pete Buttigieg.

The South Bend, Ind. mayor officially threw his hat in the 2020 race Sunday, and -- as media reporter Joe Concha noted earlier this week -- he has received major press coverage.

"You can run in the moderate lane as the Bobby Kennedy candidate, so long as there's not anything newer on the block," Shapiro said, noting that O'Rourke and Buttigieg are both white males, but Buttigieg is openly gay.

"Buttigieg drank his milkshake," he continued. "I think Beto is toast."

He added that Sen. Bernie Sanders (I-Vt.), a 2020 Democratic candidate himself, is the only "thought leader" on the left, while the more moderate Democratic candidates just spout "platitudes" as their policy positions drift to the left.

"Nobody in the Democratic Party actually has the stones to run as a moderate inside the Democratic Party, although it's probably the best possible way for them to win the nomination," Shapiro said.

"All you have to do is not be crazy, and they can't stop themselves. They just can't."

Watch the "Tucker Carlson Tonight" segment above.

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