A dramatic bid to block Donald Trump's presidential library from being built in Miami is being masterminded by an 85-year-old retired professor who has repeatedly compared the Republican to Adolf Hitler. Dr. Marvin Dunn, 85, who has claimed Trump's use of the state to target political enemies is 'no different' from the German dictator, launched the legal case that is threatening to upend ambitious plans for the commander in chief's legacy. It makes Trump the latest president to face problems over his library, which is expected to house a massive archive of two terms of records and artifacts, including a...