Twenty Republican former US Attorneys released an open letter to the public on Tuesday in which they accused President Donald Trump of threatening the rule of law and declared their support for Joe Biden.

The letter is jointly written and signed by former US Attorneys who were appointed and served under Republican presidents, including Dwight Eisenhower, Richard Nixon, Gerald Ford, Ronald Reagan, George HW Bush and George W Bush.

The letter accuses Trump of threatening the rule of law, stating:

the President has clearly conveyed that he expects his Justice Department appointees and prosecutors to serve his personal and political interests in the handling of certain cases–such as the investigations into foreign election interference and the prosecution of his political associates–and has taken action against those who have stood up for the interests of justice. He has politicized the Justice Department, dictating its priorities along political lines and breaking down the barrier that prior administrations had maintained between political and prosecutorial decision making–a barrier that has been fundamental to maintaining confidence among the American people that their Justice Department is acting as a fair and impartial arbiter of prosecutorial discretion. Finally, he has undermined the Department’s ability to unify and lead our nation’s law enforcement by picking political fights with state and local officials in a naked effort to demonize and blame them for the disturbances in our cities over the past several months.”

Not only did the former US attorneys denounce Trump in the letter, but they announced their support for Biden and Kamala Harris, stating: “We firmly believe that Vice President Joe Biden is the candidate who can–and will–provide the leadership we need to refocus the Justice Department on the cause of impartial justice and to address the deep-seated societal issues that are roiling our country today. We give him our strongest endorsement, and we hereby announce that we will each be voting for Joe Biden and Kamala Harris to serve as the next President and Vice President of the United States.”

The letter is signed by US attorneys from numerous states spanning six decades, including Florida, California, Missouri, Arizona and more.