Graham is up this cycle and knows he’s vulnerable for any number of reasons. He’s saved any hearings leading up to Nov. to maximize effect.
The GOPe either believed the Russia hoax or they saw it as a way to get rid of Trump and have President Pence, a member of the club. Nunes was the only GOP member of the Gang of 8 who was loyal to Trump. And for that Schiff had him sidelined for 8 months Chairman of the House Intel Committee on some bogus ethics violation. Ryan was a real snake along with Gowdy in preventing subpoenas while the Reps controlled the House.