Obamacare Is Here to Stay. Brace for New Health Care Battles.

The era of existential fights over Obamacare has ended.

The Affordable Care Act has survived its third major Supreme Court challenge — what Justice Samuel Alito described in his dissenting opinion as an “epic trilogy.” The law has gone from a 5-4 majority in its favor in the first case to Thursday’s 7-2 split. The decision secures the health law as a major legacy of the Obama era — the largest expansion of health coverage in decades — after years of hard-fought and politically painful battles.

Obamacare enjoys higher-than-ever public support, with most Americans now favoring the law. Enrollment in the health law’s programs is at a record high. Democrats have moved from defending the 2010 law to expanding its benefits. While Obamacare remains a dirty word in some Republican circles, its repeal is no longer a focus of the party or a galvanizing issue among its voters.

For nearly a decade, Republicans ran and won many elections on the promise of ending Obamacare. But their failed bid to do so in 2017 changed their political priorities. That effort left them divided, bruised and on the wrong side of public opinion. Though President Donald Trump periodically threatened to return to repeal efforts, Mitch McConnell, the Senate minority leader, who once called to eliminate the law “root and branch,” said in 2019 that he had no interest in revisiting the law before the next presidential election. At the 2020 Republican National Convention, the word Obamacare was not uttered onstage by any elected official.

The most recent lawsuit was a holdover from an earlier era of Obamacare politics. Filed by state attorneys general in 2018, it sought to eliminate Obamacare entirely and has taken years to wend its way through the courts.

The Supreme Court did not dive into the merits of the case, but instead found that the plaintiffs did not experience any harms that would give them standing to challenge the law.

The waning repeal effort has given Democrats their first chance in a decade to press forward on a new campaign: moving the country toward a system of universal health coverage. It seems the end of a period when Democrats played constant defense, fighting back against legislative and legal challenges.

Their recent expansion of health insurance subsidies had widespread support in the party. The stimulus package that Democrats passed in January spent $34 billion to make coverage more affordable for nearly all Americans who purchase their own health plans. That change, however, was temporary and is currently set to expire at the end of 2022.

Fights about health policy are sure to remain heated, but they will be about what comes next. Democrats are still divided over many leading proposals, even if they remain united in their support of their past work.

Those efforts to move toward universal health coverage are complicated, with potentially high costs, difficult policy trade-offs and the risks of industry opposition.

Even policies with widespread support in Congress could face intense lobbying campaigns from opponents who fear additional government intervention and loss of revenue. One example is a proposal to eliminate surprise medical billing. It enjoyed bipartisan political support but faced an avalanche of industry opposition. Its success was not assured, but it passed in December.

Just this week, Senate leadership is considering a legislative package that could include an expansion of Medicare to cover more middle-aged Americans and to provide dental, vision and hearing benefits. The provision would be costly, and will probably face resistance from health industries. Other ideas, like President Biden’s campaign proposal of a government-run “public option” that Americans would have the choice to purchase, are at the earliest stages of conception.

And the post-Obamacare dream of many progressives, “Medicare for all,” continues to divide the party. Such a policy would face fierce opposition from hospitals, doctors and insurers, who already have an advocacy group to combat further government involvement in health care.

The Affordable Care Act still has holes that have proved challenging to fix. The 2012 Supreme Court decision that upheld the individual mandate also made the law’s Medicaid expansion provisions optional. Twelve states do not participate in that program, leaving millions of low-income Americans without coverage. Generous incentive payments included in the most recent stimulus package have not been enough to convince any of the holdout states to join.

Some political voices are still calling for the end of Obamacare, but they are growing rarer. In 2012, nearly every leading Republican politician expressed disappointment or anger at the first Supreme Court decision upholding the core of the law. On Thursday, few commented.

Ted Cruz, the Texas senator who once drove a government shutdown demanding an Obamacare repeal bill, had issued no statement by noon Eastern on Thursday. Neither had Josh Hawley, a Republican senator from Missouri who had helped bring the suit as his state’s attorney general. (Mr. Hawley did tweet about another Supreme Court case decided Thursday.)

Virginia Foxx, the ranking member of the House Education and Labor Committee and a Republican from North Carolina, was among those politicians who criticized the decision Thursday.

“It’s a shame the highest court in the country ruled today that Americans aren’t harmed by this broken law,” she said in a statement. She cited a need for “workable solutions that will bring down the cost of health care.”

The statement did not include a call for Obamacare’s repeal.