Joe Biden scored a dominating win in Saturday's South Carolina primary. Less than 48 hours later, three rivals have dropped out and the endorsements are flooding in.

So why are so many prominent Democrats coalescing around Biden after one win and three disappointing finishes? The immediate answer involves a huge number of delegates at stake tomorrow on Super Tuesday. But why Biden?

For answers, we turn to former Clinton administration official Larry Haas. We also ask whether Pete Buttigieg and Amy Klobuchar dropped out of the race on their own accord or were pushed out.

Haas and Radio America's Greg Corombos also discuss President Obama refusing to join the parade of endorsements, Joe Biden's regular verbal gaffes, and how Bernie is likely to respond to Democrats uniting against him.