The House Oversight Committee is launching an investigation into the White House security clearance process, an inquiry that promises to put a spotlight on how President Donald Trump's senior adviser and son-in-law, Jared Kushner, overcame concerns to gain access to highly classified information.

"The Committee on Oversight and Reform is launching an in-depth investigation of the security clearance process at the White House and Transition Team in response to grave breaches of national security at the highest levels of the Trump administration," Rep. Elijah E. Cummings, the chairman of the Committee on Oversight and Reform, said in a letter to the White House obtained by NBC News.

Last February, NBC News reported that more than 130 political appointees working in the Executive Office of the President did not have permanent security clearances as of November 2017, including the president's daughter Ivanka; Kushner, her husband; and the president's top legal counsel. Kushner has since obtained a clearance, according to his lawyer, despite reports that he has been targeted for manipulation by foreign governments.

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"For the past two years, I have sought information with other Committee Members about a series of extremely troubling incidents regarding the security clearances of some of President Trump's top aides, but the White House has refused to provide the information we requested, often ignoring our requests completely," Cummings said.