Four GOP senators vote against Donald Trump's Canada tariffs. Also, Sen. Cory Booker's 25-hour Senate speech gave Democrats a voice of resistance against the Trump administration. Plus, Michigan Democrat Mallory McMorrow enters the U.S. Senate race. And the Trump-Musk cuts to USAID intensifies the humanitarian crisis in Sudan. Sen. Amy Klobuchar, MI State Sen. Mallory McMorrow, and Declan Walsh join Lawrence O'Donnell.