A fourth high-level adviser to Ben Carson's presidential campaign has resigned only hours before Thursday's Republican debate.

Dean Parker, the campaign's finance chairman and senior adviser, announced Thursday morning that he has resigned his post, even though he said he will continue to back Carson's 2016 efforts with only two and a half weeks until the Iowa caucuses.

The news also comes out hours after Politico reported that Parker recently began taking in $20,000 a month for what is usually an honorary role, and has run up high expenses and not run a tight ship. Parker called the allegations "misrepresentations."

"It has been a great honor to serve alongside Dr. Carson as he seeks the office of President of the United States," Parker said in a statement. "While current allegations towards me are misrepresentations, my primary goal is to help Dr. Carson save our nation. I am excited about the growing momentum behind him and look forward to even greater days ahead."

The announcement comes a little more than two weeks after former campaign manager Barry Bennett, communications director Doug Watts and deputy campaign manager Lisa Coen quit on New Years Eve, citing Carson's outside advisers as the main reason, particularly Carson's business manager Armstrong Williams.

Williams declined to comment on Parker's departure.

As recently as nine days ago, Parker was on the front lines defending the Carson campaign, having told MSNBC's Kate Snow that the turmoil and turnover in the Carson camp was overblown.

"We have a campaign staff of over 120 people right now. So five people of 120 people — now they were some very significant roles. But you have to understand that Dr. Carson is a leader. He's standing in to be the commander in chief," Parker said in the Jan. 5 interview. "We know Barry Bennett was a great campaign manager, a good friend of mine. Doug Watts, our head of communications, phenomenal guys. But it's just like a baseball team — does the same pitcher pitch the whole way through the game? No. There's starters and then there's finishers."

There is no word yet on who will replace Parker going forward. Gen. Bob Dees, the campaign's chairman, told the Washington Examiner that the campaign is "carefully considering" would will fill this "voluntary role."