Utah got the go-ahead to run its own insurance exchange, but the federal blessing may not last. iStockphoto.com hide caption

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Gov. Bill Haslam speaks to reporters after announcing in Nashville, Tenn., on Monday that that he had decided against creating a state-run health insurance exchange. The Republican governor said he will leave it to the federal government to run the marketplace. Erik Schelzig/ASSOCIATED PRESS hide caption

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MIT health economist Jonathan Gruber, who explained the ins and outs of health overhaul in a comic book, says that excluding the value of health insurance from federal taxes is a terrible idea, at least from an economist's point of view. Macmillan hide caption

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The largest tax break in the federal code doesn't appear on the forms the average person fills out each year. iStockphoto.com hide caption

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Keith Gresham, 65, lines up four medications he takes at his home in Detroit in 2011. The self-employed painter was without health insurance for about a decade and was happy to finally turn 65 last year so he could qualify for Medicare. Patricia Beck/MCT/Landov hide caption

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Medical marijuana advocates demonstrate outside a San Francisco fundraiser for President Obama in February. Justin Sullivan/Getty Images hide caption

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Nebraska Gov. Dave Heineman announced Thursday that his state will choose the federal health insurance exchange program. Nati Harnik/AP hide caption

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Problems with a computer system could delay work on health insurance exchanges. iStockphoto.com hide caption

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Health insurance plans that require consumers to pay more in out-of-pocket medical expenses may have hidden costs. iStockphoto.com hide caption

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