The Wire outlines the biggest legal challenges to Obamacare:
Federal exchange states aren’t eligible for tax subsidies: Because the Affordable Care Act only specifically mentions subsidies for exchanges “established by the state,” the federal exchange can’t grant subsidies.
Tax laws should be introduced in the House, not the Senate: The argument was that Obamacare violated the Origination Clause of the Constitution, which says that bills for raising revenue have to originate in the House and basically piggy backs off the conservative talking point that Obamacare is a tax, not a law.
Contraceptives coverage defies religious freedom: The contraceptives mandate doesn’t make or break the law, but it’s a blow to women and women’s rights activists.
If religious employers are exempt, nonprofits like schools should be as well: The University of Notre Dame re-submitted a lawsuit over Obamacare that was originally rejected in January.
Obama might be “rewriting his own law”: Technically this isn’t a legal case, but the House Judiciary Committee will review those arguments, as well as the legal case against subsidies.