Participants in the Medicare for All Rally in Los Angeles California on February 4, 2017.

 The Trump administration is asking the Supreme Court to wipe out Obamacare, arguing that the individual mandate is unconstitutional and that the rest of the law must be struck down with it.

The late-night brief, filed Thursday in the middle of the coronavirus pandemic, carries major implications for the presidential election. If the justices agree, it would cost an estimated 20 million Americans their insurance coverage and nullify protections for pre-existing conditions.