March 23 will be the second anniversary of President Obama's Affordable Care Act, a massive collection of complex provisions that is sure to be a major issue in this year's re-election campaign. While voters are under siege by advocates on both sides, the US Supreme Court will add to the confusion by considering whether it's constitutional. (A decision is expected in June.) In the meantime, Americans are spending more on healthcare than anyone else, and rising costs are increasing the federal deficit. Why do we spend twice as much as other countries for the same care and similar outcomes? Will "Obamacare" change that? If not, what else do we need?