On March 27, special counsel Robert Mueller sent a letter to Attorney General Bill Barr objecting to his March 24 characterization of his report into Russian interference in the 2016 election.

Why it matters: Barr is about to testify before the Senate Judiciary Committee, where he is sure to be grilled about why he did not publicly release prepared summaries of the report, as Mueller requested. Some Democrats, who have already questioned Barr's independence for his controversial rollout of the report, are calling on the attorney general to resign.