In stunning reversal, Justice Department makes huge decision about future of Obamacare

The Justice Department revealed Monday that it will side with a federal district court ruling last year that found the Affordable Care Act, or Obamacare, unconstitutional.

The decision is a significant reversal from the agency's previous stance, which declared that certain aspects of the law, like the "individual mandate," are unconstitutional, but could be severed from the law's main framework.

The decision means that the government will not defend the law's constitutionality on appeal.