On Friday, the Supreme Court moved forward with what may become a historic rebuke of President Obama’s unilateral executive action by agreeing to review the issue of Obamacare subsidies raised under King v. Burwell.

At issue in the case is the administration’s decision to ignore the clear wording of the Affordable Care Act that says subsidy payments can only be administered to those who purchase insurance “through an exchange established by the state.” When only a handful of states agreed to establish their own Obamacare exchanges, the administration ignored the language of the Affordable Care Act in order to pump billions of dollars in taxpayer subsidies out the door to defray the cost of Obamacare plans and entice people to enroll.