Two teams face off in a debate over the extent of the president's war powers at the latest debate from Intelligence Squared U.S. Samuel LaHoz/Intelligence Squared U.S. hide caption

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Cell towers are constantly tracking the location of mobile phones. And that data, federal courts have ruled, is not constitutionally protected. Steve Greer/iStockphoto.com hide caption

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George Washington is depicted addressing the Constitutional Convention of 1787 in this painting by Junius Brutus Stearns. Presumably, no representative from Rhode Island is in the picture; Rhode Island boycotted the gathering and originally rejected the Constitution. AP hide caption

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The U.S. Supreme Court, 70 years after rejecting Roscoe Filburn's bid to limit the federal government's power to regulate commerce. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images