All 33 Democratic members of the House Oversight Committee and House Judiciary Committee sent a letter Tuesday demanding an "immediate" investigation of President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE, Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsTrump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status White House officials voted by show of hands on 2018 family separations: report MORE and top White House aides, following a week of bombshell reports on the Trump administration.

The letter, addressed to the chairmen of both committees, starts:

“We are writing to request that the Oversight Committee and the Judiciary Committee launch an immediate joint investigation into whether President Donald Trump and his top officials are engaged in an ongoing conspiracy to obstruct the criminal, counter-intelligence, and oversight investigations currently being conducted by the Federal Bureau of Investigation, the Department of Justice, and Congress into members of his presidential campaign and their contacts with Russian officials."

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The letter was sent as the Trump administration grapples with the aftermath of Trump's surprise firing of former FBI Director James Comey last week, a fallout on Monday after reports emerged that Trump disclosed highly classified information to Russian diplomats and a new report Tuesday evening that Trump asked Comey to stop his investigation of former national security adviser Michael Flynn.

"Given the gravity of the events that have occurred over the past several weeks, there is simply no reasonable question that the Oversight Committee and Judiciary Committee should already be conducting a robust investigation of these issues that includes public hearings, document requests, and interviews and depositions," the letter continues. "It is unacceptable to continue ignoring these scandals.”

All 33 Democrats on the two committees signed the letter.

"We have a solemn obligation under the Constitution to act as a check on the Executive Branch and to hold President Trump accountable," the letter concludes. "It is time to do our job.”