With the Supreme Court set to hear oral arguments next week in a case that could undermine individual insurance subsidies for federally run health care exchanges, President Barack Obama took time Monday during a speech to the National Governors Association to thank governors for expanding Medicaid under the Affordable Care Act. “I want to thank all of the governors, Democrats and Republicans, supporters and some opponents of the ACA, who’ve expanded Medicaid to millions of people over the past two years,” Obama said. “I think there’s a recognition that it makes sense, and it’s bigger than politics. As Governor [John R.] Kasich said, for Ohio, it saves lives. No question about it.” Twenty-eight states and the District of Columbia have expanded Medicaid to cover adults with incomes up to 133 percent of the federal poverty level who are under age 65.