“The Committee is deeply concerned with these discussions and whether they essentially indicate that two of the highest ranking law enforcement officials in the United States were discussing what amounts to a coup against the President,” Graham wrote to Barr. “Accordingly, the Committee plans to conduct oversight into these discussions and related matters.”
Meanwhile, Graham requested all documents and communications to “show the names, titles, and business addresses of all personnel who participated in any meeting” with Rosenstein and McCabe between May 9, 2017—the day former FBI Director James Comey was fired—and May 17, 2017—the day Robert Mueller was appointed as special counsel.
Graham gave Barr a deadline of March 29 to comply with the document requests
https://www.foxnews.com/politics/senate-judiciary-to-investigate-alleged-25th-amendment-discussion-with-rosenstein-mccabe