You can't buy across State lines because of State Insurance laws. Burr apparently wants to abridge that right. Considering the Tea Party/Republican stance on state's rights that is odd to say the least.

Its true that they do not compete much within states. Though all the large companies are large enough to be national. One thing that the Republicans do not factor in is the special deals that insurance companies cut with local Health Care networks. I don't think that there is a dime to be saved by allowing shopping over state lines. But the potential for the consumer to be ripped off increases exponentially.