Democratic leaders in Congress sent a letter to the Justice Department on Tuesday questioning whether information divulged about the Russia investigation during a classified briefing for congressional leaders by agency officials last month was disclosed to lawyers working for President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE.

A letter from the Democratic members of the Gang of Eight, which includes House Minority Leader Nancy Pelosi Nancy PelosiHoyer: House should vote on COVID-19 aid — with or without a bipartisan deal Ruth Bader Ginsburg lies in repose at Supreme Court McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE (D-Calif.), Senate Minority Leader Charles Schumer Chuck SchumerCruz blocks amended resolution honoring Ginsburg over language about her dying wish Senate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' MORE (D-N.Y.), Sen. Mark Warner Mark Robert WarnerDemocrats call for declassifying election threats after briefing by Trump officials It's time to upgrade benefits Intelligence chief says Congress will get some in-person election security briefings MORE (D-Va.) and Rep. Adam Schiff Adam Bennett SchiffPelosi, Democrats unveil bills to rein in alleged White House abuses of power Chris Matthews ripped for complimenting Trump's 'true presidential behavior' on Ginsburg Trump casts doubt on Ginsburg statement, wonders if it was written by Schiff, Pelosi or Schumer MORE (D-N.Y.), asks the agency to confirm that no materials from their briefing were later reported to Trump's lawyers.

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The letter comes in response to demands from Trump's attorney, Rudy Giuliani, for information on the use of an FBI informant that spoke to members of the Trump campaign as part of the investigation. Information on the informant was part of the congressional briefing.

"These demands, if fulfilled, would grossly violate our system of checks and balances, established procedure and fundamental norms. Although he has not been indicted, President Trump’s own conduct reportedly remains under examination by the Special Counsel," the Democrats wrote.

"And absent an indictment, the subjects of federal investigation cannot access law enforcement or related national security information for any reason."

The letter also demands that Justice Department officials cease briefing other congressional Republicans, notably Rep. Trey Gowdy Harold (Trey) Watson GowdySunday shows preview: Election integrity dominates as Nov. 3 nears Tim Scott invokes Breonna Taylor, George Floyd in Trump convention speech Sunday shows preview: Republicans gear up for national convention, USPS debate continues in Washington MORE (R-S.C.) of the House Oversight and Government Reform Committee, on the Russia investigation. That demand also follows the White House's initially organizing a briefing that only included Republican leaders. That meeting included Gowdy and House Intelligence Committee Chairman Rep. Devin Nunes Devin Gerald NunesOvernight Defense: Stopgap spending measure awaits Senate vote | Trump nominates former Nunes aide for intelligence community watchdog | Trump extends ban on racial discrimination training to contractors, military Trump nominates former Nunes aide to serve as intel community inspector general Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election MORE (R-Calif.), also a member of the Gang of Eight.

The Democrats go on in the letter to say that Trump's attorneys and Republicans will seek to use the information to discredit the FBI and the Justice Department.

"As the President’s attorney has made clear, his legal team wishes to obtain the classified information at issue, not for any legitimate purpose—but instead to frustrate and discredit publicly the work of the Department of Justice and the Federal Bureau of Investigation," they wrote.

"These developments leave us concerned that, through his legal team or otherwise, the President will continue to pressure your agencies to divulge investigative information which he, his attorneys, and his congressional allies then could manipulate or even disclose publicly for the President’s personal or political benefit. That would be a terrible abuse of power"

Justice Department officials briefed both the group of just Republicans as well as the full Gang of Eight last month on the FBI's use of the informant, after which Gowdy seemed to rebuke the president and his allies by claiming that the agency's practices were aboveboard.

"I am even more convinced that the FBI did exactly what my fellow citizens would want them to do when they got the information they got, and that it has nothing to do with Donald Trump," he told Fox News.