I have blogged about the Internal Revenue Service’s attempt to tax, borrow, and spend $800 billion contrary to the clear language of ObamaCare, and how both Oklahoma (in Pruitt v. Sebelius) and a group of individuals and small businesses (in Halbig v. Sebelius) have filed suit to block this raw power grab. The Congressional Research Service writes that these challenges “could be a major obstacle to the implementation of [ObamaCare].” George Mason University law professor Michael Greve writes:

This is huge: all of Obamacare hangs on the outcome…If successful…[either] case will bring Obamacare’s Exchange engine to a screeching halt…In short, this is for all the marbles.

Last week, the Halbig plaintiffs asked the U.S. district court for the District of Columbia to speed things up. Though the IRS doesn’t have to respond to the Halbig complaint until July, the plaintiffs filed a motion for summary judgment asking the court to rule on the case before the end of 2013. According to the plaintiffs:

Plaintiffs need a determination on the merits far enough in advance of January 1, 2014, to allow them to conform their behavior to the law. Because the validity of the regulation turns on a purely legal question and the administrative record is closed, Plaintiffs are moving for summary judgment now, and hope thereby to avoid the need to litigate a motion for preliminary injunction or temporary restraining order at the eleventh hour.

The plaintiff’s motion for summary judgment cites my paper (with Jonathan Adler), “Taxation Without Representation: The Illegal IRS Rule to Expand Tax Credits Under the PPACA.”

On June 17, one week from today, Cato will host a policy forum on Halbig v. Sebelius featuring plaintiffs’ counsel Michael Carvin and other luminaries. Register here.