The Supreme Court seemed likely Tuesday to leave in place the bulk of the Affordable Care Act, including key protections for pre-existing health conditions and subsidized insurance premiums that affect tens of millions of Americans.

Chief Justice John Roberts and Justice Brett Kavanaugh, among the conservative justices, appeared in two hours of arguments to be unwilling to strike down the entire law — a long-held Republican goal that has repeatedly failed in Congress and the courts — even if they were to find the law’s now-toothless mandate for obtaining health insurance to be unconstitutional.

The court’s three liberal justices are almost certain to vote to uphold the law in its entirety and presumably would form a majority by joining a decision that cut away only the mandate, which now has no financial penalty attached to it. Congress zeroed out the penalty in 2017, but left the rest of the law untouched.

“Would Congress want the rest of the law to survive if the unconstitutional provision were severed? Here, Congress left the rest of the law intact,” Roberts said. “That seems to be a compelling answer to the question.”

For his part, Kavanaugh said recent decisions by the court suggest “that the proper remedy would be to sever the mandate and leave the rest of the act in place.”

A week after the 2020 election, the justices heard arguments by telephone in the midst of the coronavirus pandemic in the court’s third major case over the 10-year-old law, popularly known as “Obamacare.” Republican attorneys general in 18 states and the administration want the whole law to be struck down, which would threaten coverage for more than 23 million people.

California, leading a group of Democratic-controlled states, and the Democratic-controlled U.S. House of Representatives are urging the court to leave the law in place.

Kavanaugh is one of three justices appointed by President Donald Trump on a court that is more conservative than the ones that sustained the law in previous challenges in 2012 and 2015. The others are Neil Gorsuch and new Justice Amy Coney Barrett, who joined the court late last month following her hurried nomination and confirmation to replace the late Justice Ruth Bader Ginsburg.

The three Trump appointees have never ruled on the substance of the health care law. Barrett, though, has been critical of the court’s earlier major health care decisions sustaining the law, both written by Roberts.

The Supreme Court could have heard the case before the election, but set arguments for a week after. The timing could add a wrinkle to the case since President-elect Joe Biden strongly supports the health care law.

The case turns on a change made by the Republican-controlled Congress in 2017 that reduced the penalty for not having health insurance to zero. Without the penalty, the law’s mandate to have health insurance is unconstitutional, the GOP-led states argue.

If the mandate goes, they say, the rest of the law should go with it because the mandate was central to the law’s passage.

However, enrollment in the law’s insurance markets has stayed relatively stable at more than 11 million people, even after the effective date of the penalty’s elimination in 2019. According to the nonpartisan Kaiser Family Foundation, enrollment dropped by about 300,000 people from 2018 to 2019. Kaiser estimates 11.4 million people have coverage this year.

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