Ivanka Trump was found in 2017 to have used a personal account to send hundreds of emails to Cabinet officials, White House aides and assistants in violation of federal rules, The Washington Post reported.
The March 4 letters to the White House - signed by House Intelligence Committee Chairman Adam Schiff, House Foreign Affairs Committee Chairman Eliot Engel and House Oversight and Reform Committee Chairman Elijah Cummings - requested interviews with "linguists, translators or interpreters" who in any way listened to Trump and Putin's conversations.
In his letter, Cummings also singled out former White House chief strategist Steve Bannon and former deputy national security adviser K.T. McFarland, questioning whether they preserved documents related to a proposal to transfer nuclear power technology to Saudi Arabia.
The request is part of the Oversight Committee's broader effort to get information about White House operations and Kushner's security clearance process.
According to Cummings, Lowell said that Kushner has been in compliance with the law, and that he takes "screenshots" of communications on his private WhatsApp account and forwards them to his official White House email account or to the National Security Council. According to Cummings, when Lowell was asked if Kushner ever communicated classified information on WhatsApp, Lowell responded, "That's above my paygrade".
Cummings says that he expects to hear back from the White House or will be forced to pursue other avenues to obtain the information he has requested.
Cummings said he and Rep. Trey Gowdy, the committee's Republican chairman at the time, met with Lowell, the personal lawyer for Kushner and Ivanka, in December 2018. Cummings says that appears to violate the Presidential Records Act.
Cummings also asked for information on any White House official who used personal email, texts or other methods to conduct official business. Lowell referred inquiries to the White House and National Security Council about whether Kushner communicated classified information through WhatsApp, something that Cummings said would constitute a "major security breach".
Cummings said that Trump's lawyer, Abbe Lowell, told the committee that Trump doesn't preserve official emails she receives in her personal account if she doesn't respond to them.
Counsel to the President Pat Cipollone on Thursday rejected a demand made by House Democrats to hand over documentation of President Donald Trump's conversations with Russian President Vladimir Putin.
Bannon also received a January 29, 2017, email from Barrack that Cummings said was a pitch of the plan sent to inform "Bannon's official work relating to developing 'broader Middle East policy'".
"This is why, from the Nation's beginning, Presidents from all political parties have determined that the law does not require the Executive Branch to provide Congress with documents relating to confidential diplomatic communications between the President and foreign leaders", the attorney added.
Regarding Mr Trump's communications with Mr Putin, Mr Cummings, House Intelligence chairman Adam Schiff and Foreign Affairs chairman Eliot Engel say they are examining the substance of in-person meetings and phone calls, the effects on foreign policy, and whether anyone has sought to hide those communications.
The president must be free to engage in discussions with foreign leaders without fear that those communications will be disclosed and used as fodder for partisan political purposes.
Cipollone's letter was in response to two letters sent to the administration by Cummings, Schiff and Engel earlier in the month.