Following the leak of Trump's lewd statements on women, many Republicans are withdrawing their support

Donald Trump was already unpopular within his party during the primary season, but now the list of Republicans who are openly opposing the candidate is growing following the newly uncovered video from 2005 in which he brags about groping women.

Despite some members of the GOP calling for Trump, 70, to drop out of the presidential race in wake of the controversy, he told the Washington Post on Saturday that he would “never withdraw,” adding that the support he’s receiving is “unbelievable.”

He echoed the remarks on Twitter, writing Saturday, “The media and establishment want me out of the race so badly – I WILL NEVER DROP OUT OF THE RACE, WILL NEVER LET MY SUPPORTERS DOWN!”

Although he’s gained the support of former New York City mayor Rudy Giuliani, New Jersey Governor Chris Christie and more, the list of those speaking out against Trump and his recently surfaced comments is growing. Find out what Republicans are saying against the party’s candidate below.

Arizona Senator John McCain

McCain, who ran as the party’s presidential candidate in 2008, announced he would not be voting Republican and would write in a candidate through a statement on Saturday.

“I have wanted to support the candidate our party nominated,” he said in a statement. “He was not my choice, but as a past nominee, I thought it was important I respect the fact that Donald Trump won a majority of the delegates by the rules our party set. I thought I owed his supporters that deference.

“But Donald Trump’s behavior this week, concluding with the disclosure of his demeaning comments about women and his boasts about sexual assaults, make it impossible to continue to offer even conditional support for his candidacy.”

McCain’s daughter, Meghan, previously told PEOPLE she shed tears when Trump clinched the GOP nomination for president at the Republican convention. She also said she would be writing in a candidate and voting for her father.

Former Secretary of State Condoleezza Rice

“Enough! Donald Trump should not be President,” the former Secretary of State said in a Facebook post following the surfacing of the 2005 audio. “He should withdraw.”

Rice did not elaborate on who she would vote for in November, but wrote, “As a Republican, I hope to support someone who has the dignity and stature to run for the highest office in the greatest democracy on earth.”

Former California Governor Arnold Schwarzenegger

Schwarzenegger released a statement on Saturday announcing that he will not be voting for Trump.

“For the first time since I became a citizen in 1983, I will not vote for the Republican candidate for President,” the Austrian-born actor shared via Twitter. “Like many Americans, I’ve been conflicted by this election – I still haven’t made up my mind about how exactly I will vote next month.”

Carly Fiorina

Fiorina, who lost in the Republican primaries against Trump, called for the Republican National Committee to replace Trump with his running mate. “Donald Trump does not represent me or my party,” Fiorina said in a Facebook post. “I understand the responsibility of Republicans to support their nominee. Our nominee has weighty responsibilities as well. Donald Trump has manifestly failed in these responsibilities.”

Ohio Senator Rob Portman

Alaska Senator Dan Sullivan

Ohio Governor John Kasich

Colorado Senator Cory Gardner

Virginia Representative Barbara Comstock

Alaska Senator Lisa Murkowski

Maine Senator Susan Collins

Nevada Representative Joe Heck

“I believe any candidate for President of the United States should campaign with common ethical and moral values and decency. I accept that none of us are perfect. However, I can no longer look past this pattern of behavior and inappropriate comments from Donald Trump. Therefore, I cannot, in good conscience, continue to support him nor can I vote for Hillary Clinton,” Heck said at a rally in Las Vegas on Saturday. “I believe our only option is to formally ask Mr. Trump to step down and allow Republicans the opportunity to elect someone who will provide us with the strong leadership so desperately needed and one that Americans deserve.”

South Dakota Senator John Thune

South Dakota Governor Dennis Daugaard

Idaho Sen. Mike Crapo

Nebraska Senator Deb Fischer

Nebraska Senator Ben Sasse

Illinois Representative Rodney Davis

Utah Senator Mike Lee

New Hampshire Senator Kelly Ayotte

Utah Governor Gary Herbert

Illinois Senator Mark Kirk

Former New York Governor George Pataki

West Virginia Senator Shelley Moore Capito

Missouri Representative Ann Wagner

Alabama Representative Martha Roby

Arizona Senator Jeff Flake

Utah Representative Mia Love

Trump has not let the growing list of GOP leaders who are turning against him get him down. On Sunday he thanked his supporters while taking a dig at the “establishment” Republicans who had spoken out against him.

Trump will make his first public event appearance since the tape scandal on Sunday when he will face off against Hillary Clinton in the second presidential debate.