Tonight on The Last Word: Trump lawyers attempt a new delay tactic in the January 6 probe. Also, anonymous donations to a group led by Ginni Thomas raises new Supreme Court ethical concerns. Plus, Arizona is bracing for a three-way Senate battle in 2024. And Vice President Harris seeks to deepen U.S.-Africa ties. Neal Katyal, Dan Horwitz, Sen. Sheldon Whitehouse, Rep. Ruben Gallego and Caroline Randall Williams join Lawrence O'Donnell.