Selling insurance across state lines is a vacuous idea, encrusted with myths. The most important myths are that it’s illegal today, and that it’s an alternative to the Affordable Care Act. The truth is that it actually is legal today and specifically enabled by the Affordable Care Act. The fact that Republicans don’t seem to know this should tell you something about their understanding of healthcare policy. The fact that it hasn’t happened despite its enablement under the ACA should tell you more about about why it’s no solution to anything.