Musk's DOGE team targets the Social Security and IRS systems. Plus, the White House claims in a court filing that Elon Musk is not the administrator of DOGE. Also, a former USAID officials speaks out against the Trump-Musk funding freeze. And Lawrence O'Donnell discusses the legacy of SNL's Executive Producer Lorne Michaels with Susan Morrison, author of the new book ‘Lorne.' Sen. Amy Klobuchar, E.J. Dionne, and Anne Linn also join Lawrence O'Donnell.