Nice article on Slate:

How Devin Nunes Helped Robert Mueller

The irony of this new situation is that, as Susan Hennessey has observed, outgoing House Intelligence Committee Chairman Devin Nunes, Rep. Mike Conaway (who purportedly led the Russia inquiry after Nunes quasi-recusal), lead interrogator Trey Gowdy, and the other GOP members of the committee may, wholly unintentionally, prove to have been devastatingly effective questioners in the service of future false-statement prosecutions.

Republicans on the House Intelligence Committee really encouraged Trump associates to lie, implying that there would be no consequences. They have even refused to send their hearing transcripts to Mueller, to impede him. But in January, Democrats will do that, first thing. Then Mueller will have scads of perjury charges he can use to flip witnesses.