Senator Bernie Sanders led a rally of thousands at Macomb County in Michigan Sunday to protest Republicans' proposed rollback in health care in the United States.

"If you want to improve the Affordable Care Act, let’s work together,” Sanders said, addressing Republicans. “But if you think you’re simply going to throw millions off of health insurance, you’ve got another guess coming."

He reminded the audience that the U.S. was "the only major country on earth not to guarantee health care to all people as a right" and said "our job today is to defend the Affordable Care Act, our job tomorrow is to create a Medicare-for-all single-payer system."

President-elect Donald Trump has promised to repeal The Affordable Care Act, often dubbed "Obamacare,“ but has not yet announced plans for it’s replacement.

"Real change always takes place — whether it is the civil rights movement, the women’s movement, the gay movement, the environmental movement — it always takes place from the bottom on up,” Sanders added.

The event was one of many country-wide.