A federal judge says Donald Trump knew the voter fraud claims were false. Also, Trump-backed Doug Mastriano pushes an antisemitic trope in Pennsylvania. Plus, President Biden announces steps to lower gas prices. And Sen. Sheldon Whitehouse details the GOP "scheme" to control the Supreme Court. Andrew Weissmann, Barbara McQuade, Pennsylvania Attorney General Josh Shapiro and White House Chief of Staff Ron Klain also join Lawrence O'Donnell.