(CNN) Beto O'Rourke's best moment on Thursday's Democratic presidential debate -- which also doubled as his best moment in the 2020 campaign to date -- came when ABC's David Muir asked whether he supported a mandatory buyback of assault weapons.

The former Texas congressman defended that stance in an interview on CNN's "New Day" Friday, insisting the issue would not hurt his party.

"It's not a concern of mine and that's in part informed by listening to people in conservative parts of America," he said. "And folks are saying, 'Look, I would give up that AR-15 or that AK-47. I don't need it to hunt, don't need it to defend myself in my home.' They recognize this is a weapon designed for war, to kill people as effectively, as efficiently, and in a great a number as possible."

Which, well, count me skeptical that O'Rourke's idea will gain widespread political support. Here's why.

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