John M. Gore’s law firm, Jones Day, has joined another firm, Porter Wright, in filing a suit in Pennsylvania. At least four lawsuits are already pending in the state and at least one filing alleges “irregularities.”

Gore previously served as the principal deputy assistant attorney general for the DOJ’s Civil Rights Division but returned to Jones Day in 2019 after he was accused of perjury. He was a partner at the firm before joining the administration in 2017.

The accusation relates to claims by Gore and former Commerce Department transition official Mark Neuman that Neuman did not help Gore draft a letter defending the inclusion of a citizenship question in the 2020 census.

Gore was asked in a deposition if he wrote the first draft of the letter and said that he had.

The letter justified the citizenship question by saying its intention was to protect the voting rights of racial minorities. This argument was rejected by lower courts, with the U.S. Supreme Court majority concluding it was “contrived,” according to NPR.

The Campaign for Accountability, a government watchdog, claimed Neuman had provided Gore with a draft of the letter, which would contradict their testimony if true.

They also pointed to the late Republican redistricting strategist Thomas Hofeller. One document found among his papers included a paragraph that matched part of Gore’s letter word for word.

“The Trump administration’s cynical attempt to add a citizenship question to the 2020 Census to protect Republican legislative districts is a transparent abuse of power,” Campaign for Accountability director Daniel Stevens said in a statement last year.

The ACLU, New York Civil Liberties and the law firm Arnold & Porter filed a request on July 16, 2019 asking a U.S. district judge in New York to consider penalties for the Trump administration for officials allegedly giving false or misleading statements under oath.

“Through the use of false or misleading testimony, they obscured evidence suggesting that the true purpose of Secretary [Wilbur] Ross’s decision to add a citizenship question to the 2020 Census—suppressing the political power of minority immigrant communities,” their lawyers argued.

Both Gore and Neuman denied the accusations and neither went on to face sanctions for their depositions. Gore left the administration in the same year, returning to Jones Day in November, 2019.