UPDATE 1 — Trump bans media outlets CNN, MS NOW, Politico from White House
(Adds Trump quotes in paragraphs 2-3, request for comment in paragraph 4, context in paragraph 5) WASHINGTON, Sept 18 (Reuters) — U.S. President Donald Trump banned news outlets CNN, MS NOW and Politico from the White House on Friday, complaining about their coverage in a social media post. "Effective immediately, I am