President Trump asked the FBI to drop its probe into former national security adviser Michael Flynn and urged former FBI director James B. Comey instead to pursue reporters in leak cases, according to associates of Comey who have seen private notes he wrote recounting the conversation.

According to the notes written by Comey following a February meeting with the president, Trump brought up the counterintelligence investigation into Flynn and urged Comey to drop the probe in the wake of the national security adviser’s resignation.

The conversation between Trump and Comey took place after a national security meeting. The president asked to speak privately to the FBI director, and the others left the room, according to the Comey associates, who, like other officials, spoke on the condition of anonymity because they were not authorized to reveal internal discussions.

“I hope you can let this go,’’ Trump said, according to the Comey notes, which were described by the associates. Comey’s written account of the meeting is two pages long and highly detailed, the associates said.

The conversation described in the notes raises new questions about whether Trump may have crossed any legal lines into criminal behavior by pressuring the FBI to end an investigation.

National Security Adviser Michael Flynn, left, and K.T. McFarland, deputy national security adviser, center, listen as White House press secretary Sean Spicer speaks in the James S. Brady Press Briefing Room during the daily news briefing at the White House in Washington, DC on Wednesday, Feb. 1, 2017. (Jabin Botsford/The Washington Post)

“There’s definitely a case to be made for obstruction,” said Barak Cohen, a former federal prosecutor who now does white-collar-defense work at the Perkins Coie law firm in the District. “But, on the other hand, you have to realize that — as with any other sort of criminal law — intent is key, and intent here can be difficult to prove.”

The revelation also marks the second major challenge for the White House this week, coming just a day after a report in The Washington Post that the president disclosed highly classified information to Russian diplomats during a private meeting last week at the White House. And it comes at a particularly precarious time for the Trump administration as it searches for someone to nominate to succeed Comey as the next leader of the FBI — the official who will take over investigations into Russian interference in the 2016 election and any coordination between Trump associates and Russian officials.

Comey’s account of the February talk made it clear that his understanding of the conversation was that the president was seeking to impede the investigation, according to people who have read the account or had it read to them. Comey’s notes also made it clear he felt that the conversation with the president was improper and decided to withhold details of it from the case agents working on the Russia probe, according to the associates.

The details of Comey’s meeting notes were first reported by the New York Times.

According to the director’s notes, Comey did not respond…