The probability of President Biden exiting the presidential race has soared to an unprecedented 55% on PolyMarket, following ex-President Barack Obama’s voiced apprehensions regarding Biden’s campaign trajectory and debate performance.

Late Tuesday, the Washington Post divulged that Obama, perturbed by Biden’s reelection prospects after a lackluster debate showing and emphasizing Trump’s formidable electability, has been covertly counseling and aiding Biden while outwardly maintaining confidence in his campaign.

However, bettors remain uncertain about the precise timing of Biden’s potential withdrawal. The market assigns a 42% likelihood of Biden bowing out before the Democratic convention slated for August 19. According to the New York Times, Democratic party leaders have preemptively crafted a contingency plan for Biden’s possible withdrawal, with the process of securing a new nominee expected to be intricate.

Read more: Prediction Markets Signal Biden’s Popular Vote Victory, But Trump Likely to Win Presidency

The simplest approach would be to nominate Vice President Kamala Harris, Biden’s current running mate. Recognizing this path of least resistance, the market elevated Harris’ odds of clinching the Democratic nomination to 31% on Tuesday, as reported by CoinDesk.

Meanwhile, PolyMarket bettors assign Harris a 13% probability of winning the presidential election, while Biden holds a 16% chance. Over $211 million has been wagered on the general presidential election contract on PolyMarket, with nearly $10 million staked on Biden’s potential dropout.