Donald Trump on Friday announced Vice President-elect Mike Pence would take over transition planning from Chris Christie, a move that sources say reflect a diminished role for the New Jersey governor. Sources tell NBC News that the controversy surrounding two former Christie aides being convicted in the closure of George Washington Bridge lanes was an issue, but more significant was Christie's failure to vocally defend Trump at key moments throughout the campaign. Pence, meanwhile, increasingly earned Trump's trust and respect by becoming one of his more vocal defenders on the campaign trail. Christie will remain a vice-chair, along with a...