The investigation under Judiciary Chairman Jerrold Nadler (D-N.Y.) will focus on three key areas: obstruction of justice, public corruption and abuses of power. Nadler rolled out the expansive investigation less than a week after the president’s former attorney Michael Cohen delivered explosive public testimony against him on Capitol Hill.

Democrats will be looking at those involved in the June 2016 Trump Tower meeting between Trump campaign officials and a Russian lawyer linked to the Kremlin, the Trump Organization's plans to build a Trump property in Moscow and a scheme to pay off two women who alleged they had affairs with Trump before the 2016 election.

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In a statement, Nadler accused Trump of evading “accountability for his near-daily attacks on our basic legal, ethical, and constitutional rules and norms.”

“Investigating these threats to the rule of law is an obligation of Congress and a core function of the House Judiciary Committee,” Nadler said. “We have seen the damage done to our democratic institutions in the two years that the Congress refused to conduct responsible oversight. Congress must provide a check on abuses of power.”

Trump blasted the investigation as a “hoax” but said he would comply with it, telling reporters at a White House event to congratulate a college football team's championship that “I cooperate all the time with everybody.”

The committee is demanding a trove of documents from the White House, including those related to the removal of former national security adviser Michael Flynn, the termination of former FBI Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE and any conversations about the removal of special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE.

The committee is also asking for documents from a slew of current and former White House and administration officials, including Flynn, Trump son-in-law and senior adviser Jared Kushner Jared Corey KushnerAbraham Accords: New hope for peace in Middle East Tenants in Kushner building file lawsuit alleging dangerous living conditions Trump hosts Israel, UAE, Bahrain for historic signing MORE, former White House chief of staff Reince Priebus Reinhold (Reince) Richard PriebusLeaked audio shows Trump touted low Black voter turnout in 2016: report Meadows joins White House facing reelection challenges Trump names Mark Meadows as new chief of staff MORE, former White House communications director Hope Hicks Hope Charlotte HicksSenate intel leaders said Trump associates may have presented misleading testimony during Russia probe: report Cuomo turned down Trump invitation to participate in April press briefing: report Trump shakes up White House communications team MORE and former White House counsel Don McGahn.

Nadler first announced that the committee would be issuing the document requests on Sunday, telling George Stephanopoulos on ABC News’s “This Week” that it is “very clear that the president obstructed justice” by firing Comey.

The White House said Monday that it has received the request and would respond at the “appropriate time.” It is unclear whether the White House will assert executive privilege to skirt some of the requests.

“The House Judiciary Committee’s letter has been received by the White House. The Counsel’s Office and relevant White House officials will review it and respond at the appropriate time,” press secretary Sarah Huckabee Sanders said in a statement.

The committee is also seeking documents from former Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE, who worked for Trump’s campaign and later served in the administration. Sessions was fired by Trump, who never forgave the early supporter of his presidential campaign for recusing himself from the Russia investigation headed by Mueller the day after November’s midterm elections

They also want documents from Allen Weisselberg, the Trump Organization’s chief financial officer who emerged as a key person of interest during Cohen’s public testimony last week.

Cohen claimed before the House Oversight and Reform Committee that Weisselberg would be able to support his claims that the president knew about the hush money payments made to women claiming they’d had affairs with Trump, among other business deals.

They are also requesting information from the parent company of The National Enquirer, American Media Inc. (AMI), which was granted an immunity deal from federal prosecutors in Manhattan who are actively investigating the hush money payments, in exchange for its cooperation with the probe.

Several individuals who have been charged by or cooperated with Mueller are also receiving requests, including Flynn, former Trump campaign chairman Paul Manafort Paul John ManafortOur Constitution is under attack by Attorney General William Barr Bannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention MORE, longtime Trump ally Roger Stone Roger Jason StoneThe agony of justice Our Constitution is under attack by Attorney General William Barr Justice IG investigating Stone sentencing: report MORE and former Trump campaign aide Richard Gates.

A committee counsel told reporters Monday that the immediate goal of the requests is to put together “a very large treasure trove of evidence” that can be combed through to help guide the investigation and determine future witnesses.

The committee is giving the recipients two weeks to respond voluntarily to the document requests, and plans to take steps to subpoena them if the individuals do not comply.

“These are documents we plan to get one way or another,” the committee counsel said.

The investigation reflects a burgeoning effort by Democrats to use their newfound majority in the House to launch aggressive probes into Trump and his administration. The leaders of two powerful committees, the House Intelligence Committee and the Oversight committee, Chairmen Adam Schiff Adam Bennett SchiffChris 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 Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-Calif.) and Elijah Cummings Elijah Eugene CummingsBlack GOP candidate accuses Behar of wearing black face in heated interview Overnight Health Care: US won't join global coronavirus vaccine initiative | Federal panel lays out initial priorities for COVID-19 vaccine distribution | NIH panel: 'Insufficient data' to show treatment touted by Trump works House Oversight Democrats to subpoena AbbVie in drug pricing probe MORE (D-Md.), have also launched their own probes into the administration.

Republicans on Monday pushed back on their efforts.

“We don’t even know what the Mueller report says, but Democrats are already hedging their bets," Rep. Doug Collins Douglas (Doug) Allen CollinsTrump, Biden tied in Georgia: poll Loeffler paints herself as 'more conservative than Attila the Hun' in new campaign ad Vulnerable GOP incumbents embrace filling Supreme Court seat this year MORE (R-Ga.), the ranking member of the House Judiciary panel, said in a statement. "After recklessly prejudging the president for obstruction, Chairman Nadler is pursuing evidence to back up his conclusion because, as he admits, ‘we don’t have the facts yet.’”

Trump has lambasted Mueller and Democrats over their respective investigations, claiming he is the target of partisan and improper probes. On Sunday, Trump accused House Democrats of “Presidential Harassment.”

“Presidential Harassment by ‘crazed’ Democrats at the highest level in the history of our Country,” Trump wrote on Twitter. “Likewise, the most vicious and corrupt Mainstream Media that any president has ever had to endure - Yet the most successful first two years for any … President. We are WINNING big, the envy of the WORLD, but just think what it could be?"

Later, he also suggested that Cohen’s explosive public testimony before Cummings’s committee last week contributed to the failure of his denuclearization talks with North Korean leader Kim Jong Un.

Nadler’s committee has jurisdiction should Democrats decide to bring impeachment proceedings against Trump, though he said Sunday that the committee would conduct its investigation before starting any impeachment effort.

“We have to do the investigations and get all this. We do not now have the evidence all sorted out and everything to do — to do an impeachment. Before you impeach somebody, you have to persuade the American public that it ought to happen,” Nadler told ABC.

Nadler said Monday that prosecutors in Mueller’s office and in the Southern District of New York are “aware” of the committee’s investigation, signaling he took steps to make sure the requests did not interfere with ongoing investigations linked to Trump.

“We have sent these document requests in order to begin building the public record. The Special Counsel's office and the Southern District of New York are aware that we are taking these steps,” Nadler said in a statement.

“We will act quickly to gather this information, assess the evidence, and follow the facts where they lead with full transparency with the American people,” Nadler added. “This is a critical time for our nation, and we have a responsibility to investigate these matters and hold hearings for the public to have all the facts. That is exactly what we intend to do."