Not merely un-American, they claimed that Mr. Obama was not American. There is a HUGE difference. Mr. Trump, in fact, led the charge on the racist birther tripe, calling for Mr. Obama to prove that he was a citizen by showing his birth certificate. Yet this same individual is fighting tooth and nail not to disclose his taxes. All of Mr. Trump's predecessors provided their tax and income information freely without prompting or challenge. Some would say Mr. Trump is behaving un-American here. Yet Republicans still support and enable him? Why is that, I wonder?