‘Advantage Warren’ as Dems ready for pivotal

‘Advantage Warren’ as Dems ready for pivotal debate-politico: Bernie Sanders is recovering from his heart attack. Joe Biden is under siege, and laying into Donald Trump. And the entire Democratic presidential field has become consumed with the House’s impeachment inquiry into the Republican president. With so many candidates responding to circumstances beyond their control, and the threat of a destabilizing moment running high on a stage that’s expanding to 12 candidates from 10, it’s raising the specter of a debate Tuesday that finally breaks the Democratic primary logjam.