The way to frame a Supreme Court argument meant to persuade Justice Anthony M. Kennedy is to talk about liberty. It is his touchstone and guiding principle, and his conception of liberty is likely to determine the future of President Obama's health care law. If the administration is to prevail in the case, it must capture at least one vote beyond those of the court's four more liberal justices, who are thought virtually certain to vote to uphold the law. The administration's best hope is Justice Kennedy. The point was not lost on Solicitor General Donald B. Verrilli Jr., who concluded his defense of the law at the court this week with remarks aimed squarely at Justice Kennedy. Mr. Verrilli said there was "a profound connection" between health care and liberty.