Jared Kushner Jared Corey KushnerAbraham Accords: New hope for peace in Middle East Tenants in Kushner building file lawsuit alleging dangerous living conditions Trump hosts Israel, UAE, Bahrain for historic signing MORE's second interview with special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's team took seven hours, an attorney for 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 son-in-law said Wednesday.

Abbe Lowell said on CNN's "The Situation Room" that the April interview took "almost an entire work day" as investigators delved into Kushner's "unique role" as a former campaign aide who was present during the White House transition and took a spot in the new administration.

Lowell did not reveal what specific questions were asked, but said the investigators focused on Kushner's relationship with Michael Flynn, as they did during the first interview in November. Flynn has pleaded guilty to lying to the FBI about his contacts with Russians.

The questions were centered on the "allegations of Russian collusion" with the Trump campaign and contacts with foreign officials, Lowell said. He added that Kushner was not questioned on his trouble with financial disclosure forms, which he has had to repeatedly amend.

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Lowell noted Kushner was one of the first administration figures to voluntarily interview with the special counsel and said he would continue to cooperate.

Still, Lowell said he couldn't imagine the special counsel having more questions for Kushner.

"I don't know that anyone could be cooperating more," he said.

Lowell's appearance came soon after it was reported that Kushner had finally been granted a top security clearance in the White House, something that had been in the works for more than a year.