Health and Science

He is the 'King' of the case that could wreck Obamacare

This "King" is looking to checkmate Obamacare.

The Virginia man who is the lead plaintiff in a that threatens billions of dollars in financial aid to help people buy Obamacare health plans is a diehard opponent of President Barack Obama, writing online that the president is an "idiot," according to a new report.

David King, 64, also has used social media to post altered images of First Lady Michelle Obama wearing Middle Eastern garb, called the president's political party the "Democraps," and jokingly wrote that the "NSA, FBI and the other three letter government workers" are keeping an eye on him, the news site Politico revealed Thursday night.

Read MoreThe poisoned politics of key Obamacare case

One of King's online posting includes an image from the movie "Back to the Future," with the words, "Marty, there is no time to lose. You must go back in time and give Obama's dad a condom," according to Politico.

U.S. Supreme Court
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The Fredricksburg resident is also less than a year away from qualifying from Medicare, the single-payer, federal government-run health-care program that obviates King's eligibility for federal subsidies to help buy insurance on

"Everyone is entitled to his opinion," King told Politico, referring to his Facebook page.

The report said King's social media accounts also "show he is a proud grandfather who loves his family, enjoys cooking and sharing photos from conservative blogs."

He also could help seriously damage Obamacare in 37 states, including Virginia, whose residents are served by, the federally run insurance exchange.

Read MoreObamacare sign-ups top 10M as deadline approaches

King's lawsuit is one of the federal court challenges to the often-generous tax credits that help low- and middle-income people pay for the monthly premiums of health plans. King's household income of $39,000 in 2014 made him eligible for such aid.

The suits are based on the argument that those subsidies can only be issued to customers of an Obamacare exchange set up by a state, not by the federal government, because of specific language in the Affordable Care Act authorizing such assistance.

The Supreme Court last year agreed to hear King's case, known as King v. Burwell, and is set to hear oral arguments March 4. A ruling is expected in late June.

If the Supreme Court invalidates the subsidies, there is widespread belief that millions of people will drop their insurance in the affected states because it will become too pricey, and that premiums for the remaining customers would rise significantly.

"I sued the irs over this bull s—... get ready," King posted on Facebook on Oct. 8, 2013, according to Politico.

King's case names the Internal Revenue Service as a defendant because it was an IRS regulation that explicitly stated that subsidies could be issued to customers of either state-run or federally run Obamacare exchanges. The case claims that the IRS's regulation goes against clear language of the ACA that refers to subsidies being issued to customers of an exchange established by a state.

At that time King wrote that boast of a post on Facebook, was in a technological meltdown that left it unable to enroll significant numbers of customers, there were growing concerns that Obamacare's goals were in serious peril as a result.

And few people at that time were even aware of King's lawsuit, much less of the belief that it would ever seriously imperil Obamacare in the states after that site was repaired.

The group that is bankrolling King's suit, and the others challenging the federal exchange subsidies would not comment on how King or the other plaintiffs were chosen for those cases, nor would it comment on King's penchant for teeing off on Obamacare online.

"This case is about the IRS illegally rewriting the law. It's not about anyone's political beliefs or what is on their Facebook page," Sam Kazman, general counsel of the Competitive Enterprise Institute, told Politico. "Our plaintiffs simply want their day in court."

Read the entire Politico story here.