The Supreme Court shook up the Justice Department’s prosecution of several January 6 defendants on Friday with a ruling that they couldn’t be charged with obstruction simply for rioting at the Capitol — and former President Donald Trump is trying to capitalize on the ruling with a motion to have the charges against him in special counsel Jack Smith’s election conspiracy case dismissed. But that’s probably not going to work, former Nixon White House Counsel John Dean told CNN’s Brianna Keilar. “In this particular case of Trump, if he is able to get something dismissed here, the political impact…