Thursday, September 12, 2019: Debate Fight Night

It is debate night for the 2020 Democrats, the first time Joe Biden and Elizabeth Warren share the same stage, and perhaps a last chance for some of the struggling contenders to prove to voters and donors they deserve to stick around. Plus, a big Supreme Court immigration win for the Trump White House. The justices allow the President's tough new asylum rules to be enforced while a legal challenge makes it way through the lower courts. And words matter. Except maybe when it comes to House Democrats. Do they have a formal impeachment investigation or just a lower level inquiry to determine whether to move to an impeachment investigation? It depends on who and how you ask. Today's panel: CNN's Kaitlan Collins, Franco Ordoñez with NPR, CNN's Arlette Saenz , Karoun Demirjian with The Washington Post, CNN's Joan Biskupic and CNN's Sara Murray. Also on the program: CNN's Jeff Zeleny, NPR's Asma Khalid, CNN's Manu Raju, and CNN's Christine Romans

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