Obamacare opponents outside the Supreme Court in March, 2014 Jay Mallin/ZUMA The Supreme Court today is considering whether to hear a challenge to Obamacare that could deprive 8 million people of their newly acquired health insurance. If the court does decide to take the case, though, it will be buying into a legal argument that is frequently deployed by a different group of anti-Obama litigants—those who are trying to challenge the president's citizenship. The case, King v.