House Democrats will hold an emergency conference call on Thursday to discuss President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE’s decision to fire Jeff Sessions as attorney general.

The call, organized by Minority Leader Nancy Pelosi Nancy PelosiPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare House lawmakers reach deal to avert shutdown Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill MORE (D-Calif.) and first reported by Politico, is seen as the beginning of Democratic scrutiny of Trump’s controversial move as they prepare to assume control of the chamber in January.

Rep. Jerrold Nadler (D-N.Y.), the top Democrat on the House Judiciary Committee, will brief the Democratic conference on the state of play and outline the potential ramifications of Sessions's dismissal, according to a Democratic congressional source.

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Briefings are also expected from Rep. 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 (Md.), the ranking member on the House Oversight and Government Reform Committee, and Rep. 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 (Calif.), the top Democrat on the House Intelligence Committee.

Democratic leaders want to ensure that lawmakers are all on the same page as they figure out how to proceed.

Democrats have been demanding answers about Sessions from Judiciary Committee Chairman Bob Goodlatte (R-Va.) and Sessions's replacement, Acting Attorney General Matthew Whitaker.

They want to know how the shakeup at the highest level of the Justice Department will impact special counsel Robert Mueller's Russia investigation.

In a letter to Whitaker, Democrats warned that a "constitutional crisis" could ensue if the Mueller probe is not protected, urging the new top cop to recuse himself and place Deputy Attorney General Rod Rosenstein back in the supervisory role for the probe.

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“There is little doubt that President Trump’s decision to force the firing of Attorney General Sessions places Special Counsel Mueller’s inquiry at grave risk,” Democrats wrote.

The lawmakers asked Whitaker to confirm who is supervising the investigation, while also "strongly" suggesting that Rosenstein should continue oversight of the probe.

They argued it would be "inappropriate" for Whitaker to oversee the investigation given his public comments about his views toward the Mueller investigation. Whitaker has said Rosenstein should limit the "scope" of the investigation, writing in a CNN op-ed last year that the probe has gone "too far."

Olivia Beavers contributed.