Appearing Sunday on NBC’s “Meet the Press,” Ben Carson stood by an earlier comment he made about Obamacare being the worst thing since slavery. Speaking at the Values Voter Summit in October, the retired neurosurgeon said the Affordable Care Act is “the worst thing that has happened in this nation since slavery.” “And it is in a way,” he said then. “It is slavery in a way, because it is making all of us subservient to the government, and it was never about health care. It was about control.” Host David Gregory ran a clip of the comment, then put...