Subpoenas haven't worked before; see, among others: Attorney General William Barr, still unpunished after he was summoned before Congress to explain his possibly misleading summary of Mueller's report, which Barr nearly didn't release publicly (and then with heavy redactions).
That all points to a series of delicate exchanges in which members of the committees press him - but not too hard - for important information outside the text of the report, and Mueller resists - but not too stridently - and eventually gives some ground.
The report stated that there was no evidence that Trump's campaign conspired with the Russian government during the 2016 U.S. presidential election, but didn't conclude if the President had obstructed justice. "He has to go to what's in the report, but we're going to be asking questions that are outside the report", Schiff said.
But they added, "the American public deserves to hear directly from you about your investigation and conclusions".
Since then, Democrats have continued to negotiate with Mueller, holding out hope he would agree to testify voluntarily.
Schiff tells me that beyond whether criminality occurred, another big question is whether there were "conflicts of interest" that "resulted in US policy favoring Russian Federation against the interests of the American people".More news: Emery implores board to sign £130,000-a-week Premier League star
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Regarding 'bias, ' Gowdy claimed Mueller's office hired, "people who wanted Clinton to win and Trump to lose" in the 2016 presidential election. Trump also eagerly encouraged and sought to profit off that interference, and even sought profitable dealings with Russian Federation, both of which he and his top associates concealed from the public.
Barr and his former deputy, Rod Rosenstein, previously reviewed the evidence laid out by Mueller examining obstruction and determined it was insufficient to accuse Trump of criminal wrongdoing. The Justice Department declined to comment. "I think they are just honoring the subpoena". After all, his May 29 statement was crafted to be bland and factual, but hearing it from the laconic Mueller had an electrifying effect.
But Democrats, furious that his report isn't gaining more traction in the public's mind, have been eager to create a made-for-television forum to air Mr. Mueller's findings.
Republicans have criticized Democrats for their continuing investigations of the president.
Jay Sekulow, one of President Donald Trump's attorneys, told CNN's Jake Tapper on Wednesday that the president has no "impeachment preparation team in place" as impeachment is not viewed as a real threat.