Sanders scores Ocasio-Cortez endorsement as centrist candidates make post-debate gains

After suffering a heart attack a few weeks ago, Sen. Bernie Sanders held a large weekend rally in New York where the Democratic presidential candidate got a boost in the form of the endorsement of Rep. Alexandria Oasio-Cortez. Meanwhile, Sen. Amy Klobuchar and Mayor Pete Buttigieg spent the weekend building on gains they made during the last debate. Judy Woodruff reports.

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