Tonight on The Last Word: Senate Democrats slam Donald Trump for “misleading” the public on Iran. Also, NBC News reports Trump told Sen. John Thune to get him a budget bill to sign by next week. And Trump OMB Director Russell Vought is confronted with a new analysis about children who died of preventable causes after USAID cuts. Rep. Adam Smith, Brendan Duke, and Nick Kristof join Lawrence O’Donnell.