Have you seen the television pictures of the tens of thousands of demonstrators at the Wisconsin State Capitol who are protesting proposed budget cuts for state employees? If so, you've had an advance peek at the sort of demonstrations that will take place if state legislatures are foolish enough to pass resolutions asking Congress to call a national convention to consider amendments to the U.S. Constitution. Barack Obama's political arm, "Organizing for America," swelled the crowds by busing in protesters from Wisconsin and from other states, too. A national convention to amend the U.S. Constitution would become the media event...