Look at what that snake Brennan said:
John Brennan, former director of the CIA
"The constitutional powers granted to the president for pardon are quite broad," Brennan said Monday on "MSNBC Live with Hallie Jackson." He added: "It doesn't exclude explicitly the president's pardoning of himself."
Pretty much confirms it. If Brennan didn't have a reason to side with Trump's claim he wouldn't. So he's basically admitting Obama pardoned himself IMO.