NY prosecutors reportedly tell witnesses to prepare for grand jury testimony in Trump criminal probe

Tonight on the Last Word: The Manhattan district attorney convenes a grand jury in the criminal probe of the Trump Organization. Also, Professor Laurence Tribe says Donald Trump’s claims of absolute immunity are “off the walls.” Plus, Michigan Secretary of State Jocelyn Benson warns counties against election audits from outside groups. And the mother of fallen Capitol police officer Brian Sicknick urges Republican senators to support the January 6th commission. Adam Kaufmann, John Heilemann, Maria Teresa Kumar and Aisha Mills also join Lawrence O’Donnell.