I do believe that the phrase "hoist on their own petard" comes to mind here:

States Fighting Health-Care Act Don't Have Precedent On Their Side | Crooks and Liars:

Reporting from Washington - Lawsuits from 14 states challenging the constitutionality of the new national healthcare law face an uphill battle, largely due to a far-reaching Supreme Court ruling in 2005 that upheld federal restrictions on home-grown marijuana in California.

But this week, Obama administration lawyers pointed to Scalia's opinion as supporting the constitutionality of broad federal regulation of health insurance, and most legal experts agreed.

I hate the individual mandate without a public option and I want to do everything possible to fix that, but pissing off Republicans just makes me smile. The fact that it's Scalia opinion that burning them on this, is just a gift.

 Hee.