The US Supreme Court has upheld a key portion of President Barack Obama’s healthcare law, preserving health insurance for millions of Americans.

In a 6-3 decision, the justices said that tax subsidies that make health insurance affordable for low-income individuals are constitutional.

The ruling preserves the law known as Obamacare, which Mr Obama considers a major part of his presidential legacy.

Republicans have vowed to continue fighting the law.

“We’ve got more work to do, but what we’re not going to do is unravel what has now been woven into the fabric of America,” Mr Obama said.

The high court case was the second major challenge to the healthcare law – often known as Obamacare – since its passage.

“Congress passed the Affordable Care act to improve health insurance markets, not to destroy them,” Chief Justice John Roberts wrote in the opinion.

Credit: BBC