Fox News cut off Peter Navarro’s final press conference on Tuesday before he turned himself in to prison for contempt of Congress. While speaking to reporters outside a federal prison, Navarro called his four-month incarceration a “little story.” The former adviser to Donald Trump was sentenced to prison after he refused to cooperate with the Jan. 6 Committee. “This is not about me,” he insisted. “One of the big stories is about what is really an unprecedented assault on the constitutional separation of powers and the doctrine of executive privilege as a critical tool dating back to George Was…