"I hope and expect this will be the only time I will speak to you in this manner," former special counsel Robert Mueller said in May as he gave what he thought would be his last public statement on his Russian collusion investigation. Yet, here he is, a day before his congressional testimony. Mueller will comply with subpoenas to appear before the House Judiciary and Intelligence committees on Wednesday. But, he's getting mixed messages from the White House and Congress. On Monday night, the Department of Justice sent the witness a letter instructing him to limit his testimony to matters...
