New Jersey Gov. Chris Christie unwittingly ignited a firestorm earlier this week when he responded to a reporter's question in Great Britain about forced vaccinations of children in New Jersey by suggesting that the law in the U.S. needs to balance the rights of parents against the government's duty to maintain standards of public health. Before Christie could soften the tone of his use of the word "balance," Kentucky Sen. Rand Paul jumped into the fray to support the governor. In doing so, he made a stronger case for the rights of parents by advancing the view that all vaccines...