Excellent. Bolton, Mulvaney, Pompeo, and any others, should have to testify. Decisions on those should be made expeditiously.
Federal Judge Rules That McGahn Must Testify, Delivering Blow To White House
[...]
White House lawyers have said McGahn is among a small cadre of current and former senior administration officials who cannot be forced to testify about matters related to the president since it risks revealing information that is protected under executive privilege. At a hearing last month, a Justice Department attorney said McGahn and other former top White House aides are shielded by "absolute immunity."
Yet Jackson was deeply skeptical about this argument, citing the challenge of enforcing it in light of the high rate of turnover among Oval Office aides. She suggested at the hearing that the legislature would be impeded in carrying out its basic oversight power if lawmakers could not call witnesses as part of an investigation into the president. She called the Trump administration's position that top aides are immune from testifying before Congress "peculiar."
[...]
McGahn said he would rather quit than fire Mueller. McGahn stepped down as White House counsel in October 2018.
Federal Judge Rules That McGahn Must Testify, Delivering Blow To White House
Oh Susie. You got it wrong again, or your news source did. The Judge ruled that McGahn must present himself before Congress, but said.....
The judge made it clear that Monday’s ruling dealt only with McGahn’s obligation to appear before the committee, saying McGahn could still invoke executive privilege where appropriate when questioned.