Overview: The Circus returns with an update on where things stand in the 2020 presidential race. On the Democratic side, the three leading candidates — Joe Biden, Bernie Sanders and Elizabeth Warren — are crisscrossing the country trying to get their message across, while the party as a whole is debating what it will take to beat Trump. Meanwhile, the President has an unprecedented number of Republican primary challengers to contend with, which could have an impact on his election strategy.