Manhattan District Attorney Alvin Bragg (D) sued House Judiciary Chair Jim Jordan (R-Ohio) Tuesday, calling his investigation into Bragg’s prosecution of former President Trump a “transparent campaign to intimidate and attack” his office’s work.

The suit, filed in federal court in New York, is the most aggressive pushback yet from Bragg in response to Jordan, who in recent days subpoenaed a former prosecutor who worked on the Trump investigation and last week asked another employee to turn over personal emails about his hiring process.

“Congress has no power to supervise state criminal prosecutions. Nor does Congress have the power to serve subpoenas ‘for the personal aggrandizement of the investigators or to punish those investigated,’” Bragg’s office writes in the suit, pointing to a case initiated by Trump that ultimately limited Congress’s subpoena power.

Bragg has also resisted efforts from Jordan to secure his testimony, arguing in prior letters that Jordan’s requests would violate the rights of those involved in the process, including Trump himself.

“The charges the District Attorney filed against Mr. Trump were approved by citizens of New York,” the suit states.

“Rather than allowing the criminal process to proceed in the ordinary course, Chairman Jordan and the Committee are participating in a campaign of intimidation, retaliation, and obstruction.”

Jordan started his own review of Bragg’s investigation just days after Trump predicted he would be arrested in connection with the probe and called on his supporters to protest.

Bragg filed an indictment of Trump last week, charging him with 34 felony counts of misclassification of business records, a charge elevated due to alleged efforts to conceal the payments to aid Trump’s 2016 election prospects.