WASHINGTON — The Supreme Court dismissed a major challenge to the Obama era health care law on Thursday, turning aside an effort by Republican-led states to throw out the law that provides insurance coverage for millions of Americans.The justices, by a 7-2 vote, left the entire law intact in ruling that Texas, other GOP-led states and two individuals had no right to bring their lawsuit in federal court. The Biden administration says 31 million people have health insurance because of the law popularly known as “Obamacare …