Joe Biden and Elizabeth Warren will share the stage for the first time on Thursday.
On Thursday, the top 10 candidates for the party’s presidential nomination meet in a debate in Houston.
The third debate will spotlight the party’s ideological divisions.
Moderate front-runner Biden will be center stage.
He will be flanked by progressives Warren and Bernie Sanders, both U.S. senators.
The Houston debate, to be televised by ABC News, is scheduled to last for up to three hours.