They need to circumscribe Roberts’ power.
Via Fox News:
Chief Justice of the United States John Roberts blocked Kentucky Republican Sen. Rand Paul from posing a question during the Senate impeachment trial Wednesday that would have named the alleged whistleblower at the center of the case, Fox News is told — and Paul may try to force the issue during the question-and-answer session that begins Thursday afternoon.
Roberts, for now, has ball control because he actually receives the questions in note cards from senators, then reads the question aloud in the Senate chamber to be answered by either House Democratic managers or Trump’s defense team. But Fox News has learned Roberts may soon lose his grip on the proceedings amid a torrent of criticism both inside and outside the Senate.
The Federalist co-founder Sean Davis condemned what he called Roberts’ “arbitrary and unilateral censorship of senators and Senate business,” and reported that Roberts had initially sought to block even general questions of the intelligence community whistleblower. When Republicans threatened a vote rebuking Roberts on the record, Davis reported, Roberts backed down and decided only to prohibit mentioning the whistleblower’s name.