Stocks rally after Donald Trump backs down and delays EU tariffs. Also, Trump seeks to end all federal contracts with Harvard University. Plus, Trump says Vladimir Putin is "playing with fire." And Wisconsin voters reject Elon Musk's political influence. Robert Reich, Rep. Jamie Raskin, Timothy Snyder, and Ben Wikler join Lawrence O'Donnell.

A second federal court rules Donald Trump's tariffs are illegal. Also, a federal judge blocks Trump's ban on Harvard University's foreign students. And Elon Musk officially leaves the White House. Rick Woldenberg, Laurence Tribe, and Rep. Melanie Stansbury join Lawrence O'Donnell.