Democratic nominee Joe Biden, center, and President Donald Trump, left,  participate in the first US presidential debate hosted by Case Western Reserve University and the Cleveland Clinic in Cleveland, Ohio, on September 29, 2020.
CNN  — 

The Republican National Committee voted unanimously on Thursday to withdraw from its participation in the Commission on Presidential Debates, the organization that has long governed general-election presidential debates.

In a statement, RNC chairwoman Ronna McDaniel said the commission is “biased and has refused to enact simple and commonsense reforms to help ensure fair debates including hosting debates before voting begins and selecting moderators who have never worked for candidates on the debate stage.”

The commission was formed in 1987 as a nonprofit sponsored by both the Republican and Democratic Parties and has sponsored debates in every presidential election since 1988. The group’s co-chairs include former RNC chairman Frank Fahrenkopf.

CNN has reached out to the commission for comment.

Thursday’s vote comes after months of signals from the RNC that it sought a break from the commission. In June 2021, McDaniel sent a letter outlining several complaints about the commission’s practices, reflecting former President Donald Trump’s concerns about the conduct of the 2020 debates.

And in January, McDaniel sent another letter threatening to “prohibit future Republican nominees from participating in CPD-sponsored debates” unless the commission changed its rules.

The RNC claims it has not pulled its future nominees out of debates entirely.

The commission drew considerable ire from Trump during the 2020 campaign, with him and his campaign aides often railing about the selected moderators, the commission’s decision to hold the second debate virtually during the coronavirus pandemic and the choice to mute each candidate’s mic during the final debate after the first contest included considerable interruptions from the then-President.

Moderators were a central issue for Republicans in 2020 – especially the selection of C-SPAN’s Steve Scully to moderate what would have been the second contest.

The Trump campaign attacked Scully for working for Biden roughly four decades earlier, leading the journalist to accidentally publicly reach out on Twitter to Anthony Scaramucci, Trump’s short-lived White House communications director. When the outreach frustrated Republicans, Scully said he had been hacked, something he later admitted was not true. C-SPAN then placed Scully on “administrative leave” for lying.

The commission eventually canceled the second debate after Trump declined to attend a virtual debate despite concerns over his Covid-19 diagnosis.

The RNC has advocated for a number of changes to the commission, including adopting term limits for its board and prohibiting members from making public comments about any candidates. McDaniel, in an echo of Trump’s concerns, has also pushed for more influence on which journalists moderate general election debates, asking the commission for a “transparent criteria for selecting debate moderators that would disqualify individuals from consideration who have apparent conflicts of interest due to personal, professional, or partisan factors.”

This story has been updated with additional reporting.