United States Attorney General Jeff Sessions has been SUBPOENAED to appear before the House Judiciary Committee to answer questions about his agency's refusal to hand-over documents relating to the 2016 Election Investigation(s).
Congress has been demanding a number of documents from the US Justice Department and FBI for MONTHS, and has gotten completely stonewalled. That will now come to and as the Top Official in the Justice Department is now being FORCED to come to Congress and answer questions.
If Sessions fails or refuses to appear, Congress can Impeach him.
Here is the actual Subpoena and the Schedule of Documents Congress is forcing him to bring: