As President Donald Trump and House Republicans in Washington D.C. celebrated the passage of their bill to repeal and replace the Affordable Care Act, some Southern Californians gathered outside one of those GOP members’ offices in Santa Clarita in a different mood.

Supporters of Planned Parenthood rallied outside the office of Rep. Steve Knight, R-Santa Clarita, Thursday afternoon, voicing their outrage after Knight voted in favor of the House bill, known as the American Healthcare Act.

“Today, Steve Knight kept his promise to the American people by voting to repeal and replace the disastrous, failed Obamacare law,” a spokesman for the National Republican Congressional Committee said in a press release.

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As late as Wednesday afternoon Knight was among three House Republicans — including Jeff Denham, R-Turlock, and David Valadao, R-Hanford – who had either opposed the GOP bill or had serious reservations. But by Thursday, they had quietly changed their minds.

“We are devastated at the vote that (Steve Knight) took today to take away the rights of those that have health coverage under the Affordable Care Act,” said Celinda Vazquez, vice president of public affairs for Planned Parenthood Los Angeles. Vasquez said a provision in the bill would defund Planned Parenthood, blocking patients from receiving a variety of medical services from Planned Parenthood facilities.

“This is a very sad day but we will continue to take care of our patients,” Vazquez said. “And we will continue to keep our doors open.”

A few dozen protesters carried signs and marched in front of Knight’s office at 26415 Carl Boyer Drive, chanting “Knight! Knight! We’re not going to go without a fight!”

Knight represents California’s 25th Congressional District, which includes Santa Clarita, Porter Ranch, Palmdale, Lancaster and Simi Valley.

President Trump hailed the bill as “a great plan and I think it will get even better,” emphasizing that it was “a repeal and replace of Obamacare.”

Trump and Republicans lawmakers say it will offer Americans more freedom to choose their healthcare, at lower prices.

The House bill has yet to receive a price tag from the non-partisan Congressional Budget Office and has been opposed by a number of physician and healthcare groups, including the American Medical Association amid concerns it could strip millions of Americans of their coverage, including those with pre-existing medical conditions.

The statement from the NRCC states “patients with pre-existing conditions will continue to be protected.”

The bill now heads to the Senate.

The Associated Press contributed to this report.