Mitt Romney's campaign has raised $4.3 million with 43,000 online donations since the Supreme Court's decision to uphold President Barack Obama's health care law, campaign spokeswoman Andrea Saul told The Huffington Post on Friday.

Saul confirmed to HuffPost that it was the campaign's biggest 24-hour small-donor haul to date, and there were still several hours to go.

Following the Supreme Court's ruling on Thursday, Romney vowed to keep on fighting for the health care law's repeal.

"If we want to get rid of Obamacare, we're going to have to replace President Obama," Romney said. "If we want good jobs and a bright economic future, for ourselves and for our kids, we must replace Obamacare."