The fourth Democratic presidential debate takes place tonight October 15th, at 8 p.m. ET at Otterbein University, outside of Columbus, Ohio, and will be broadcast by CNN. Tonight’s debate stage will feature a record 12 candidates. It could be the last debate appearance for up to 33% of them. —

The top three will face new challenges. Joe Biden will take the stage for the first time since his son Hunter has spoken out about dealings with Ukraine. Elizabeth Warren is now viewed in some polls as the front-runner. And Bernie Sanders is the back for the first time since a heart attack on the campaign trail. – Associated Press

Joe Biden is facing— persistent— allegations of wrongdoing overseas that could undermine his argument that he’s best positioned to defeat the president.

Bernie Sanders is recovering from a heart attack that raised questions about his ability to withstand the vigor of a presidential campaign. And Elizabeth Warren is fending off new scrutiny of her biography.

The debate marks the first time the candidates will meet since the House moved forward with an impeachment inquiry against President Donald Trump. While they are united on that issue, the debate will again expose a political party struggling to coalesce around a unifying message or messenger with the first primary contest just over three months away. —

Former Housing and Urban Development Secretary Julián Castro, Hawaii Rep. Tulsi Gabbard, Minnesota Sen. Amy Klobuchar and former Texas Rep. Beto O’Rourke are all in deep danger of not making November’s debate.

That means Tuesday may be the last chance for those four to give their campaigns a realistic chance to have a measure of success. —