And you believe Nunes on this, the guy who secretly went to Trump by sneaking into the White House at night and then saying he'd recused himself but didn't?
So, bring forth an investigation, but I would caution you to wait and see what the results as we continue to wait for the results from the Mueller report that Barr has been sitting on and "toying with" while submitting only his own four page "summary" of a nearly 400 page report.
BTW, Barr did much the same kind of partisan ploys when he worked for the G. H. W. Bush administration, so he does have a reputation of being at least a bit of being a political hack. Even yesterday he appeared quite disingenuous when contradicting himself by using the word "spying" and then admitting he saw no evidence for it. In any serious investigation, an AG or FBI agent is not supposed to imply guilt without significant evidence for it. It's sorta like me asking you "Have you stopped beating your wife yet?". Or maybe she's beating you?