This week the U.S. Supreme Court ruled that the federal government could continue to subsidize health-insurance coverage through Healthcare.gov, the federal exchanges. An ecstatic President Obama declared that Obamacare is “here to stay.” A judicial victory doesn’t automatically translate into a political victory, let alone a policy success. Once they’ve quaffed their celebratory champagne, the president and White House staff will need to suit up and get ready to play some hard-nosed defense.