Lawrence: Bill Cassidy did what no GOP senator has done to Trump in a decade. Yell at him.

Tonight on The Last Word: Former Secretary of State John Kerry says Iran has a new “sense of power” after Donald Trump’s war. Also, a Trump tantrum stalls a housing bill he previously supported. And the USGS reports high casualties are probable from two powerful earthquakes in Venezuela. Fmr. Secretary John Kerry and Sen. Alex Padilla join Lawrence O’Donnell.