The healthcare debate is no doubt a current, and heated issue. Both sides of the issue make persuasive points as to how constitutional it may or may not be.
Currently the case is being heard by the Supreme Court, and right now, all prosecutors and defenders are focusing on one justice in particular: Justice Anthony Kennedy.
Kennedy, as the article explains, is the swing vote among the current court, and if the health care law is to be upheld, he'll have to be persuaded of it's constitutionality.
Kennedy has historically voted to protect sexual orientation, as well as laws governing medical marijuana, and abortion. However, he must be persuaded of the liberty of the situation.