Chairman Nunes is the only member of the Intelligence Oversight Gang-of-Eight who has reviewed the executive level intelligence product which caused him concern. Nunes alleged in the last week he received evidence that Obama administration political figures gained access to unmasked American identities through foreign intercepts involving the Trump transition team between November 2016 and January 2017.
2017 Congressional Intelligence Oversight “Gang of Eight”
Trump: "I am asking the chairs of the House and Senate committees to investigate top secret intelligence shared with NBC prior to me seeing it."
Notice how in the three months since that request was made by President-Elect Donald Trump, only one member of congress has actually done what was requested. That member is Devin Nunes.