Sunday, September 15, 2019: U.S. Blames Iran for Strike on Saudi Oil

New tensions between the Trump White House and Iran after a stunning attack on Saudi oil facilities. Yemen's Houthi rebels claimed responsibility, but the Trump administration is blaming Iran. CNN's Senior International Correspondent Nick Paton Walsh joins us with a report from Tehran and CNN's John Kirby provides analysis. Plus, the Democratic presidential race turns testy as summer gives way to fall. Julian Castro questioned Joe Biden's memory and Cory Booker suggested Biden could fumble away any chance of beating President Trump. Today's panel: Margaret Talev of Axios, CNN's Nia Malika Henderson, Julie Hirschfeld Davis of The New York Times, and Vice News' Shawna Thomas.

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