Former prosecutor and longtime legal analyst Harry Litman walked through the amicus brief filed by a group of conservatives and American Oversight, which cites the late Justice Antonin Scalia in a decision that could upend Donald Trump’s desperation to delay his trial. Taking to social media on Sunday after a follower asked him to explain it in simple terms, Litman said that the way Scalia wrote his majority decision would force Trump’s appeals and delays to wait until after the trial is held. The brief, filed on Friday, addresses Trump’s claim that he has absolute immunity from any criminal p…