Washington (CNN) The House Judiciary Committee is planning to hold hearings on impeaching President Donald Trump that expand past the Ukraine investigation and wants former White House counsel Don McGahn to be forced to testify, according to a new court filing.

The judiciary panel on Tuesday asked a federal judge to make a ruling quickly on whether McGahn must testify in the House impeachment inquiry, citing a "finite window of time" when he's needed.

A quick ruling siding with the House could yield major new impeachment witnesses about the Mueller investigation, Ukraine and obstruction of justice from people who worked in the White House and have thus far refused to testify.

"The Judiciary Committee anticipates holding hearings after HPSCI's public hearings have concluded and would aim to obtain Mr. McGahn's testimony at that time," the committee wrote, referring to the impeachment inquiry hearings led by the House Intelligence Committee. "Thus, there is an urgent need for final resolution of the matter now pending before this Court."

The House's letter to federal Judge Ketanji Brown Jackson in Washington points out that it is considering impeaching Trump for obstruction of justice, for which McGahn would be a key witness since he spoke to special counsel Robert Mueller for the obstruction investigation, and for lying to Mueller, after testimony at Roger Stone's criminal trial raised questions about Trump's written answers to investigators about Russian interference in the 2016 election.

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