Rep. Doug Collins, the top Republican on the Democrat-controlled House Judiciary Committee, wrote a scathing letter to the panel's chairman, Rep. Jerry Nadler (D-NY) accusing him of putting Attorney General William Barr in an "untenable but politically convenient situation."

According to the letter, Barr would be forced to "break the law" if he complies with a subpoena for special counsel Robert Mueller's unredacted Russia report and its underlying evidence. If Barr doesn't, Nadler will "label him as part of a cover-up," according to the letter.

Barr has vowed to release a version of Mueller's Russia report by the middle of April, with redactions made to grand jury and classified information, - as required under federal law.

House Democrats voted last Wednesday to authorize subpoenas for Mueller's report and its underlying evidence with no redactions.

Collins notes that Nadler could compel AG Barr to provide the unredacted report if he launches an impeachment hearing, however the top Republican on the panel noted "Perhaps you are loath to begin an impeachment hearing when the facts do not support one."

"Instead, you refuse to head down that path for political reasons, and have chosen the path of greatest resistance, and least legality - attacking the Attorney General for refusing to break the law while misleading the American public about what the law requires or allows."

"Your decision to make groundless claims and repeatedly threaten to go to court not only distracts from other Committee business but, based on firm legal precedent, will also end -- after months, if not years, of litigation."

Democrats can cite no precedent for their demands for grand jury information from the #MuellerReport, but there’s a solution we should all be able to agree on: The Judiciary Committee should invite the Special Counsel to testify immediately. pic.twitter.com/TgofQhAb9D — Rep. Doug Collins (@RepDougCollins) April 8, 2019

Collins suggests that if Nadler isn't going to launch an impeachment hearing, he invite Mueller to testify "immediately."

"For nearly two years, Special Counsel Mueller oversaw an investigation that issued more than 2.800 subpoenas, executed nearly 500 search warrants, and interviewed approximately 500 witnesses. Attorney General Barr was never part of this investigation, and instead simply reviewed the Special Counsel's final report and has provided Congress, so far, with the Special Counsel's principal conclusions."