(CNN) Two House Democrats asked acting White House chief of staff Mick Mulvaney to immediately revoke senior White House adviser Jared Kushner's security clearance, citing "serious concerns" about the clearance's implications in a letter Thursday.

"The White House's pattern of hiding the truth and devious behavior with regard to Mr. Kushner's security clearance suggests that the Administration does not take information security seriously," Democratic Reps. Don Beyer of Virginia and Ted Lieu of California wrote.

The request comes following an NBC report last week that Kushner had been rejected for a clearance by two White House security specialists after his FBI background check raised concerns, but their supervisor overruled them. House Oversight and Reform Chairman Elijah Cummings, a Maryland Democrat, launched an investigation into the White House's security clearance process earlier last week.

Beyer and Lieu cited five letters they had sent to the administration over the past two years raising concerns about "Kushner's track record of 'omitting' meetings, relationships, and business interests that tie him to foreign officials from his SF-86 clearance application."

The Democratic lawmakers blasted the White House for providing them with "no relevant information" on NBC's reporting that Kushner's overruled rejection was "one of at least 30 cases" approved by that supervisor, Carl Kline -- an "unprecedented" number of rejections, according to the network.

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