Lawrence: On the 88th day of Donald Trump's 'smart war,' his Cabinet once again laughed about war

Tonight on The Last Word: The U.S. launched new “self-defense” strikes on Iran. Also, the majority of GOP voters oppose Donald Trump’s $1.776 billion “slush fund.” Plus, North Carolina Democrat Roy Cooper looks to flip a GOP Senate seat. And a new book marks America’s 250th anniversary in the era of Trump. Rep. Chris Deluzio, Andrew Weissmann, Roy Cooper, and Eddie Glaude join Lawrence O’Donnell.