Americans have debated the Constitution since the day it was signed, but seldom have so many disagreed so fiercely about so much. Would it be unconstitutional to default on our debt? Should we have a balanced-budget amendment? Is it constitutional to ask illegal immigrants to carry documents? The past decade, beginning with the disputed election of 2000, has been a long national civics class about what the Constitution means — and how much it still matters. For eight years under George W. Bush, the nation wrestled with the balance between privacy and security (an issue the framers contended with) while the left portrayed the country as moving toward tyranny. For the past three years under President Obama, we have weighed issues of individual freedom vs. government control while the right has portrayed the country as moving toward a socialist welfare state.