In an op-ed penned for Breitbart, Sen. Rand Paul (R-KY) explained that President Donald Trump's upcoming executive order--which would legalize the sale of health insurance across state lines--would come at zero cost for the taxpayer and would enable 28 million people "left behind" by Obamacare to purchase insurance cheaply. According to Paul, the executive order will create "Health Associations," which would allow people to create groups similar to large corporations in order to get lower premiums on their plans. Paul said that these Association Health Plans will "be among the biggest-free market reforms" of the healthcare industry in decades, and is...