Isolated Joe Biden facing growing pressure to withdraw from US presidential race

President Joe Biden speaks before his Covid-19 positive test (Susan Walsh/AP)

Democrats at the highest levels are making a critical push for President Joe Biden to rethink his election bid.

Former president Barack Obama has expressed concerns to allies with former speaker Nancy Pelosi privately telling Mr Biden the party could lose the ability to seize control of the House if he does not step away from the 2024 race.