House Intel Chairman Adam Schiff (D-CA) said on Tuesday that “time is running out” for Robert Mueller to testify.

“With someone like Bob Mueller, making an appeal to his patriotism and a sense of duty is the right way to go,” Schiff said Tuesday in an appearance on CNN.

“I think we’re reaching a point where if we can’t reach an agreement, and I hope we will, then we’ll have to use a subpoena,” Schiff added.

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House Intelligence Chairman Adam Schiff says he thinks “time is running out” for Robert Mueller to testify before Congress: “I think we’re reaching a point where if we can’t reach an agreement, and I hope we will, then we’ll have to use a subpoena” pic.twitter.com/ldudTyYYyj — CNN Politics (@CNNPolitics) June 18, 2019

House Dems have been sparring with Mueller over his testimony for several weeks.

Last month Mueller announced he is retiring from the Justice Department and that he will not be testifying to Congress during a brief presser.

“I hope and expect this to be the only time that I will speak to you in this manner. I am making that decision myself. No one has told me whether I can or should testify or speak further about this matter,” Mueller said. “There has been discussion about an appearance before Congress — any testimony from this office would not go beyond our report.”

“The work speaks for itself — and the report is my testimony. I would not provide information beyond that which is already public in any appearance before Congress,” Mueller added.

The Democrats originally wanted Mueller to testify before Congress on May 15, however, the plans fell through.

House Judiciary Chairman Jerry Nadler also previously threatened to subpoena Mueller if necessary.

“We will subpoena whoever we have to subpoena,” Nadler said last month. “We will hear from Mueller. We will hear from McGahn. We will hear from a lot of other witnesses.”

Mueller doesn’t want to be grilled by Republican lawmakers who will certainly ask him about his reliance on Hillary’s phony dossier and all of the corruption and conflicts of interest with his team.

Republicans will also want to know why Mueller dragged out his investigation past the 2018 midterms even though he knew early on that Trump did not collude with the Russians.