With this year's goal for enrollment in Obamacare seemingly out of grasp and the President under renewed partisan attack over the program, an official key to implementing it has resigned. Gary Cohen leads the agency that made many of the rules for the Affordable Care Act and established the Marketplaces, where Americans can buy health insurance through Obamacare, including Healthcare.gov, according to a statement Wednesday announcing his departure. The Marketplaces came under fire, when they crashed massively upon rollout. Cohen will vacate the post of Director of the Center for Consumer Information and Insurance Oversight after March 31. That's the...