Kushner's legal counsel said after the reports that Kushner was part of the federal investigation, but not a target, his client will talk to federal investigators and Congress about his contacts and his role in the Trump campaign.
Those contacts included two phone calls between April and November past year, two of the sources said.
The Washington Post is reporting that the FBI is investigating meetings that Trump's son-in-law, Kushner, had in December 2016, with Russian officials.
Brian Fallon, former press secretary for Hillary Clinton's campaign, said there's "no way Jared Kushner should have a top-level security clearance", given these reports. At the time, a White House official dismissed it as a brief courtesy meeting. He has no recollection of the calls as described. "We have asked (Reuters) for the dates of such alleged calls so we may look into it and respond, but we have not received such information".
McMaster and Cohn are declining to comment on new revelations about Kushner communications with Russia's ambassador to the United States, Sergey Kislyak.
He helped put together the president's recent trip to Saudi Arabia, Israel and the Vatican.
He faced more clashes at his first summit of G-7 rich nation's club in Italy as they discussed contentious issues of climate change, trade and immigration. but agreed to hear them out before finally deciding to pull out or not from the Paris climate accord.
David Axelrod, former president Barack Obama's chief campaign strategist, said the focus on Kushner was not a surprise.
Kushner, meanwhile, returned home this week from the president's trip overseas, and back into new controversy involving his meetings in December with Russian Ambassador Sergey Kislyak, and another meeting he took with the chief of a Russian bank that had been placed on a sanctions list by the USA government.More news: President Donald Trump Still Won't Commit To The Paris Agreement
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This news came hours after a Friday night bombshell in the Washington Post reporting that the pair discussed setting up a secret communications channel between Trump's transition team and the Kremlin.
However, Washington Post reporter Adam Entous said there is a chance that Russian Federation could have intentionally exaggerated what happened in the meeting. Reuters previously reported only Flynn's involvement in those discussions.
The bank is under the control of Russian Prime Minister Dmitri Medvedev and other members of the government, and has been used to fund major projects such as the 2014 Winter Olympics in the southern Russian resort of Sochi.
Kushner had already told the Senate Intelligence Committee that he was prepared to testify regarding his relations with Russian officials, and on Thursday his attorney, Jamie Gorelick, issued a statement saying that he would cooperate with federal investigators as well. "He was fixated" on getting "American workers back to work."Trump and his team talked to G-7 leaders about how he was going to get tax reform, deregulation and an infrastructure plan passed in the U.S., Cohen added".
Then, during a May 10 Oval Office meeting with Mr. Kislyak and the Russian foreign minister, Sergey V. Lavrov, Mr. Trump disclosed highly classified intelligence about the Islamic State to the Russians.
The White House declined to comment. The meeting was held in early December at Trump Tower in New York - Mr Trump's power base.
"How would he trust that the Russians wouldn't leak it on their side?" the former intelligence official said. Moreover, they said, nothing found so far indicates that Trump authorized, or was even aware of, the contacts.
In response, sources close to Comey told CNN he felt that it didnot matter if the information was accurate, because his big fear was that if the Russians released the information publicly, there would be no way for law enforcement and intelligence officials to discredit it without burning intelligence sources and methods.