Barack Obama took to social media Saturday to urge people to sign up for health care on the final day of Affordable Care Act enrollment. His appeal came a day after a Texas judge struck down the former president’s signature legislation as unconstitutional. Besides reminding people that Saturday would be the final day to enroll for affordable health care for 2019, Obama appeared to play down the significance of the ruling. “You might have heard about a federal court decision on a Republican lawsuit trying to strike down the Affordable Care Act in its entirety,” he said in Facebook post....