The Trump administration has asked the US Supreme Court to invalidate Obamacare, which has provided health insurance to millions of Americans.
Government lawyers said the bill became invalid after the previous Republican-led Congress repealed some bills.
Democratic challenger Joe Biden slammed the move, saying that Trump put millions of lives at risk during the coronavirus pandemic.
Health care will be the key battlefield of the November presidential election.
If the court overturns Donald Trump̵
Mr. Trump said that the cost of the plan was too high, and had promised to replace it with another plan, which retained some popular elements of the current law but reduced the number of people covered.
Under the bill, millions of people in the United States must purchase health insurance or face tax penalties.
But in 2017, Congress canceled the main content of the policy and canceled the federal fine for unsigned people, which is called “personal task”.
In a document filed with the Supreme Court on Thursday night, the Justice Department stated that “personal authorization is inseparable from the rest of the bill.”
As a result, it said: “As Congress abolished… the punishment for non-compliance, the mandate is now unconstitutional.”
Biden hopes to call the public behind the expanded Affordable Care Act. He said that if the bill is overturned, some coronavirus survivors may lose their full health care coverage.
Biden said: “They will live in a vice between Donald Trump’s two legacy: his failure to protect the American people from coronaviruses, and his relentless efforts to take medical protection from American families go.”
The United States was severely hit by the pandemic, with 2.4 million confirmed coronavirus infections and 122,370 deaths recorded, more than any other country.
However, according to the latest estimates of health officials, the actual number of infected persons is likely to be 10 times higher than the reported number.
US media reported that the Supreme Court is unlikely to hear the case before voters conduct a poll in November.