While the eyes of America were on the House vote to impeach President Donald Trump, a court ruling to leave the fate of the Affordable Care Act, also known as "Obamacare," up in the air may be a bigger risk to his 2020 re-election hopes.

The ruling Wednesday, in a lawsuit led by Republican states and backed by Trump, rendered the Affordable Care Act's individual mandate to buy insurance unconstitutional but punted on whether that meant the rest of the law must also be invalidated. That issue was sent back to the lower court judge to determine, which all but ensures the issue won't be resolved by the election.

Democrats vying for their party's presidential nomination have made health care a central issue, debating over how far-reaching government involvement should be. But the ruling highlights the one issue they are united on — that the Affordable Care Act's protections should not be undone.