Prediction markets after the debate

Prediction markets turned quickly against Biden after last week's debate.

By the numbers: Since Friday, bets on the president winning the general election dropped further, now at about 20% on Polymarket.

• On Friday, California Gov. Gavin Newsom was seen as the most likely Democratic nominee after Biden, but now Vice President Kamala Harris is strongly favored, with a 12% likelihood of replacing the president.