Tonight on The Last Word: Police respond to an active shooter at Michigan State University. Also, Trump's legal woes grow with the Georgia election probe report. And Isabel Wilkerson dissects the harsh realities of caste in the United States. Jim Cavanaugh, Chad Livengood, Andrew Weissmann, Gwen Keyes Fleming and Isabel Wilkerson join Lawrence O'Donnell.

After former Vice President Mike Pence confirmed today that he will be fighting a subpoena from Special Counsel Jack Smith, MSNBC's Lawrence O'Donnell explains why Pence's argument for why he should testify will not work and why Pence's efforts to curry favor with Trump's supporters will ultimately prove futile.