Tonight on the Last Word: Fmr. National Security Advisor Susan Rice joins Lawrence to discuss the repercussions of Trump’s decision to kill Qasam Soleimani. Also, John Bolton claims he is willing to testify in the Senate impeachment trial if he is subpoenaed. Plus, Congressman Seth Moulton explains how Trump is the “most reckless commander in chief in American history.” Former CIA Director John Brennan evaluates the Trump administration’s claims about the necessity of killing Soleimani. And Cal Perry talks to Lawrence about how Trump managed to unite Iran. Rick Stengel and Mieke Eoyang also join Lawrence O’Donnell.