(CNN) Rudy Giuliani will defy House Democrats' impeachment subpoena, a letter his attorney sent to Congress on Tuesday said.

Jon Sale, Giuliani's attorney sent a letter to Congress informing them that Giuliani will not be providing documents that were requested by subpoena.

The Office of Management and Budget also does not plan to turn over the documents that impeachment committees subpoenaed, a spokeswoman said, pointing to a letter earlier this month from White House counsel Pat Cipollone saying it speaks for OMB as well.

The White House letter slammed the impeachment investigation as "constitutionally illegitimate" and made clear the administration does not plan to cooperate.

Giuliani is also now parting ways with his personal attorney Jon Sale who has represented him in impeachment matters, Giuliani told CNN.

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