For its opponents, Obamacare is a disaster - a classic example of over-reach by an Administration that wants to expand the size and scope of the Federal government.

Supporters say The Affordable Care Act is a triumph, benefiting countless millions of Americans, while reducing the threat of personal bankruptcies in medical emergencies crippling healthcare costs.

"We have decreased the rate of the uninsured by about a third," says our guest Megan McArdle, a columnist at Bloomberg View. But Obamacare poses a potentially fatal threat.