(CNN) The White House is asserting that two former senior White House aides have immunity from testifying and is directing former Trump campaign manager Corey Lewandowski not to answer questions about events that occurred after President Donald Trump was elected.

The White House sent letters to the House Judiciary Committee on Monday about the testimony of Lewandowski and former aides Rick Dearborn and Rob Porter , who were all subpoenaed to appear on Tuesday. The White House asserted immunity for the former White House aides not to testify and instructed Lewandowski not to answer questions about his conversations with the President where the White House could invoke executive privilege, beyond what's already in former special counsel Robert Mueller's report.

"Mr. Lewandowski's conversations with the President and with senior advisers to the President are protected from disclosure by long-settled principles protecting Executive Branch confidentiality interests," wrote White House counsel Pat Cipollone, "and, as a result, the White House has directed Mr. Lewandowski not to provide information about such communications beyond the information provided in the portions of the Report that have already been disclosed to the Committee."

The House Judiciary Committee last month subpoenaed Lewandowski, Dearborn and Porter, but the two White House aides are not expected to appear, sources said, citing the White House arguments, while Lewandowski is unlikely to engage on the episodes detailed in the special counsel's obstruction of justice report where he was involved.

Democrats on the Judiciary Committee have rejected the Trump administration's legal arguments of immunity and the right to claim executive privilege.

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