You can take it to the bank that neither Rosenstein nor Wray will comply with an order to release documents. They will get an injunction from a friendly judge and it will have to be settled by the Supreme Court. We can only hope the Supremes don't invent a fourth independent branch of government in the DOJ.
I don't care if the Deep State waves impeachment like a bloody flag.
Congress absolutely has a Constitutional right of oversight.
I'd rather THAT be the argument before SCOTUS.
I think the GOP needs to begin impeachment proceedings NOW, so they can get it all on the table, before the democrats have a chance to do so next year, and bring out all the Deep State hi-jinks before the nation.
Subpoena Brennen, Clapper, Comey, Steele, both Ohrs, and all the others.
He can reassign them to a remote Alaskan outpost with NO internet connection.