Since the Presidential campaign of 2008 conservatives have complained that the U.S. Constitution has been under assault by progressives who view the document as a roadblock to the implementation of their goals. Obama stated that the Constitution is flawed because it restricts government power to encroach on the individual rights of citizens, and that a corrective is needed to positively state what the government can do.
In the years since Obama was elected, this criticism of the Constitution has morphed into a full frontal assault.
The 10th Amendment has been ripped to shreds as the Federal government has encroached on the power of the states to chart their own course, within the limits specified in the amendment. The 2nd Amendment has been attacked as the Feds attempted to make a case for massive new gun control laws by staging an illegal scheme to run guns to Mexico in order to pad statistics which would then show that the U.S. is arming the drug cartels. The Commerce Clause in Article One, Section 8, Clause 3 was erroneously used as justification for passing the mammoth government takeover of healthcare, when in fact, the clause does nothing but give Congress the power to regulate commerce between the states, foreign nations, and 'Indian tribes.'
Nothing in the clause gives the federal government the power to force citizens to buy anything.