A look at how McCain's plan to allow people to "purchase health insurance nationwide, across state lines" would impact people if enacted.

McCain argues that different states' regulations "prevent the best companies, with the best plans and lowest prices, from making their product available to any American who wants it." Although he hasn't given details, his supporters say that he favors an approach, endorsed by President Bush and championed by McCain's Arizona colleague John Shadegg, that would allow insurers to choose the state laws under which they are regulated. (I e-mailed the campaign about the specifics of McCain's approach and didn't hear back.) An insurance company that chose to be regulated under Arizona law could sell policies in New York without following New York rules. Arizona, like most states, lets companies charge what they want to people who are sick—or simply deny them coverage altogether. Under Shadegg's bill, insurers wouldn't even need to pick up and move their operations; it would be enough to file some paperwork with a state insurance commissioner and pay that state's relevant taxes.