WASHINGTON — Federal authorities are within the preliminary levels of investigating the dealing with of categorized materials discovered at former President Donald J. Trump’s Florida dwelling after he left workplace, individuals aware of the matter mentioned on Thursday.

The hassle, led by the F.B.I., stems from the invention of categorized data in 15 bins that contained paperwork, mementos, items and letters that had been taken from the White Home on the finish of Mr. Trump’s time period in obvious violation of the necessities for turning over all presidential information to the Nationwide Archives.

The event was reported earlier by The Washington Put up.

The Nationwide Archives mentioned in February that it had consulted with the Justice Division concerning the categorized materials, which it retrieved the earlier month from Mr. Trump’s Mar-a-Lago dwelling in Florida. The company described the supplies in query as “categorized nationwide safety data.”

The Justice Division has instructed the Nationwide Archives to not share with the Home Oversight Committee, which is conducting its personal investigation, particulars concerning the materials taken from the White Home by Mr. Trump, the committee disclosed on Thursday, in a touch {that a} legal investigation is likely to be underway.

In circumstances of this sort, the F.B.I. would usually take a look at an array of eventualities, together with whether or not the categorized materials was mishandled or inadvertently disclosed, and it might look at whether or not a overseas adversary may need gotten entry.

The investigation might put Mr. Trump at odds with the F.B.I. but once more.

In July 2016, the F.B.I. opened a extremely delicate investigation into whether or not any of Mr. Trump’s associates conspired with the Russians throughout the presidential marketing campaign. The F.B.I. and prosecutors would later examine Mr. Trump for obstruction after he fired James B. Comey, then the F.B.I. director, in Might 2017.

A choice to open such a delicate investigation would have required approval from senior F.B.I. officers at headquarters. Sometimes, opening such a high-profile case would come with discussions with prime Justice Division leaders, together with the Nationwide Safety Division.

Earlier than continuing with an investigation, the F.B.I. nearly actually would need an official willpower from any company concerned that data was correctly categorized.

What function Mr. Trump performed in taking the fabric from the White Home, if any, shouldn’t be publicly identified. It isn’t doubtless that he could be a goal of the investigation himself in the intervening time. Within the Hillary Clinton investigation involving the emailing of categorized data utilizing a personal server, the F.B.I. didn’t goal anybody individually.

As a part of any investigation, the F.B.I. would wish to discover out why the categorized materials was in Mr. Trump’s possession and who had entry to it. Then brokers would wish to decide who packed the bins and transported them to Florida and the circumstances surrounding that episode.

Assessing Mr. Trump’s function could possibly be complicated, partly as a result of, as president, Mr. Trump had the power to simply declassify no matter data he wished.

Mr. Trump made attacking Mrs. Clinton’s mishandling of nationwide safety supplies a centerpiece of his 2016 marketing campaign. The newest revelations about Mr. Trump’s personal laxity with categorized data and his haphazard adherence to federal record-keeping legal guidelines have spurred Democrats to accuse him of rank hypocrisy.

The Home Oversight Committee is investigating Mr. Trump’s attainable violations of the Presidential Information Act and different federal statutes. The panel has been searching for details about the contents of the bins and searching into experiences that Mr. Trump “had torn up, destroyed, mutilated or tried to tear up, destroy or mutilate” paperwork whereas in workplace.

The committee can be investigating experiences of “White Home workers or contractors discovering paper in a rest room within the White Home, together with the White Home residence.”

The Justice Division’s refusal to totally cooperate with Home investigators prompted an indignant letter on Thursday from Consultant Carolyn B. Maloney, Democrat of New York and the chairwoman of the Oversight Committee, who accused Legal professional Normal Merrick B. Garland’s company of “obstructing” the panel’s work.

The Nationwide Archives knowledgeable the committee on March 28 that it was withholding details about the contents of the bins discovered at Mr. Trump’s Mar-a-Lago property and any details about any evaluations carried out by different federal businesses, Ms. Maloney mentioned in her letter.

“Primarily based on our session with the Division of Justice, we’re unable to supply any remark,” the archives advised the committee.

“By blocking NARA from producing the paperwork requested by the committee, the division is obstructing the committee’s investigation,” Ms. Maloney wrote on Thursday to Mr. Garland, referring to the Nationwide Archives and Information Administration. “The committee doesn’t want to intervene in any method with any potential or ongoing investigation by the Division of Justice. Nonetheless, the committee has not acquired any clarification as to why the division is stopping NARA from offering data to the committee that pertains to compliance” with the Presidential Information Act, “together with unclassified data describing the contents of the 15 bins from Mar-a-Lago.”

A Justice Division spokesman declined to remark.

Mr. Trump’s penchant for tearing up presidential information was revealed in a 2018 Politico article, however up to now few weeks, a collection of disclosures has raised new questions concerning the Trump administration’s failure to comply with federal record-keeping legal guidelines and its dealing with of categorized data as Mr. Trump left workplace.

A e book scheduled to be launched in October by a New York Occasions reporter revealed how workers members within the White Home residence periodically found wads of printed paper clogging a rest room, main them to imagine that Mr. Trump had tried to flush them.

In a latest assertion, Mr. Trump mentioned the boxed materials had been turned over to the archives as a part of “an atypical and routine course of” and prompt that efforts by Democrats to boost questions on his dealing with of the paperwork have been a rip-off.

“The faux information is making it look like me, because the president of the US, was working in a submitting room,” he mentioned.

The conflict with Mr. Garland is the newest instance of congressional Democrats’ rising frustration with the Justice Division. Final week, members of the committee investigating the Jan. 6 assault on the Capitol urged the lawyer common to maneuver extra rapidly to cost Mr. Trump’s closing chief of workers, Mark Meadows, with contempt of Congress.

One member of the panel, Consultant Elaine Luria, Democrat of Virginia, advised him, “Do you job so we will do ours.”

Glenn Thrush contributed reporting.