President Trump has weighed in on special counsel Robert Mueller’s investigation into Russian meddling in the 2016 election time and time again. Here’s a look at how he can limit the probe, and what Congress is trying to do about it. (Jenny Starrs/The Washington Post)

The special counsel investigating Russian election meddling has requested extensive records and email correspondence from the White House, covering everything from the president’s private discussions about firing his FBI director to his White House’s handling of a warning that the Trump national security adviser was under investigation, according to two people briefed on the requests.

White House lawyers are now working to turn over internal documents that span 13 different categories which investigators for the special counsel have identified as critical to their probe, the people said. Special Counsel Robert S. Mueller III, appointed in May in the wake of Trump firing FBI Director James B. Comey, took over the investigation into Russian meddling in the 2016 election and whether the Trump campaign coordinated with the Russians in that effort.

The list of requests was described in detail by two people briefed on them. Both insisted on anonymity in order to discuss a sensitive investigation. Some details of the requests were first reported Wednesday afternoon by The New York Times.

The requests broadly ask for any document or email related to a series of highly publicized incidents since Trump became president, including the firing of National Security Adviser Michael Flynn and Comey, the people said. The list demonstrates Mueller’s focus on key moments and actions by the president and close advisers which can address whether Trump sought to block the FBI investigations of Flynn and of Russian interference. His team is also eyeing whether the president sought to obstruct the earlier Russia probe.

The special counsel team’s work has zeroed in recent months on Paul Manafort, a former chairman of the Trump campaign, and Michael Flynn, Trump’s former national security adviser. An official close to the probe said both men are under investigation.

Mueller’s agents have questioned witnesses and business associates of both men about whether the men sought to conceal the nature of consulting work they did that could benefit foreign governments. In a raid of Manafort’s home last month, agents sought to seize records related to Manafort’s finances.

Over the last few weeks, White House lawyer Ty Cobb began sending a series of records to the special counsel. Cobb is working within the White House to gather more of those documents and has told staff and other lawyers that he hoped to turn over many more this week.

Cobb declined to discuss the subjects that Mueller’s team has questioned him about.

“The White House doesn’t comment on any communications between the White House and the Office of Special Counsel out of respect for the Office of Special Counsel and its process,” Cobb said in a statement. “We are committed to cooperating fully. Beyond that I can’t comment.”

Mueller also asked for any email or document the White House holds which relates to Manafort, the people briefed on the requests said. Manafort resigned from the campaign before the election, amid scrutiny of his work for a powerful Ukrainian political party aligned with the Russian government.

Mueller has requested that the White House turn over all internal communications and documents related to the FBI interview of Flynn in January, days after he took office, as well as any document that discusses Flynn’s conversations with Russian Ambassador Sergey Kislyak in December. Mueller has also asked for records about meetings Deputy Attorney General Sally Yates held with White House Counsel Don McGahn in late January to alert him to Department of Justice concerns about Flynn and all documents related to Flynn’s subsequent firing by the White House.

Regarding Comey, Mueller has asked for all documents related to meetings between Trump and Comey while Comey served at the FBI, records of any discussions regarding Comey’s firing and any documents related to a statement by then-press secretary Sean Spicer made on the night Comey was fired. He has also asked for any documents related to a meeting Trump held in the oval office with Russian foreign minister Sergey Lavrov the day after Comey was fired.

Mueller has also asked for all records related to the June 2016 meeting at Trump Tower with a Russian lawyer hosted by the president’s son, as well as all documents related to the White House’s response to the publication of that meeting in July 2017.

Mueller is moving as quickly as he can and is taking his three-part mandate very seriously, one government official told The Washington Post. He believes for the moment he has all the resources he needs and the office is now a fully-formed agency and using a grand jury for subpoenas and interviews vigorously, the official said.

“I am convinced that no matter where they end up, this investigation will run to completion even if they fire Mueller,” the official said. “There is a feeling of inevitability now that we didn’t have before — not of the outcome of the investigation, but that there will be an outcome. There is no escaping this thing, whatever the conclusions.”

Ellen Nakashima contributed to this report.