Obamacare has not done much to slow the growth of health care costs. Government actuaries project that health spending will grow 5.8% a year over the next decade — substantially faster than growth in the economy. Could Republican proposals to sell health insurance across state lines bend the cost curve and make premiums health plans more affordable ?

The idea seems simple enough. Right now, if you are buying your own health insurance, that coverage must be sold by an insurer regulated in your state. Instead of a national market, health insurance is sold in 51 state markets (including D.C.) with differing regulations.
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