For months, when the Affordable Care Act was still swimming upstream through the legislative process, President Barack Obama and Senate Democrats courted Senator Olympia Snowe, a Republican from Maine, thinking she would respond rationally to enticements and provide Democrats bipartisan cover to reform the U.S. health insurance system.

Their efforts ultimately failed. Snowe, like every other Senate Republican, voted against the health reform bill in 2009 and 2010, and then joined Republicans in their various efforts to undermine or repeal the law, until she retired in 2013.

But now it looks like all the time Democrats wasted on negotiating with Snowe, and allowing her to help shape the legislation, has paid off. Snowe has, to my knowledge, become the first contemporaneous Republican senator, current or former, to acknowledge that a Supreme Court challenge meant to cripple Obamacare is built on a tissue of lies. If the Court sides with Obamacare opponents, her comments will become incredibly relevant to the ensuing political shitstorm.

“I don’t ever recall any distinction between federal and state exchanges in terms of the availability of subsidies,” Snowe admitted, according to New York Times health reporter Robert Pear.

“It was never part of our conversations at any point,” said Ms. Snowe, who voted against the final version of the Senate bill. “Why would we have wanted to deny people subsidies? It was not their fault if their state did not set up an exchange.” The four words, she said, were perhaps “inadvertent language,” adding, “I don’t know how else to explain it.”

There are two intersecting argumentative threads that one must untangle to really understand King v. Burwell. The first, specialized one addresses the question of what the text of the Obamacare statute means. Does it, in all its interlocking, cross-referenced parts, provide authorization for the IRS to issue subsidies to all exchanges? Or does it prohibit those subsidies in the three dozen states that have availed themselves of federal fallback exchanges, through Healthcare.gov? Only the most cribbed reading of the law—literally less than a sentence of the whole text—suggests the latter.