Donald Trump orders a pause on military aid to Ukraine. Also, The Wall Street Journal's editorial board says Trump is taking "the dumbest tariff plunge." Plus, a USAID memo says the Trump aid cuts will threaten lives on a "massive scale." And a top FBI official is forced out over Trump January 6 cases. Sen. Mark Kelly, Sen. Gary Peters, fmr. Amb. Samantha Power, and Andrew Weissmann join Lawrence O'Donnell.

Donald Trump retreats on Mexico and Canada tariffs again. Also, Trump is criticized globally for turning on Ukraine. Plus, a federal judge rules Trump's firing of a labor board member is illegal. And Democrats hear testimony on the dangers of GOP Medicaid cuts. Amb. Bob Rae, Sen. Jon Ossoff, and Rep. Robin Kelly join Lawrence O'Donnell.