I think he was looking for his own personal gain by being on the campaign team but so did a lot of people that no longer work in the WH. I think he was just kind of naïve/dumb and got used by the FBI. I think he agreed to help the FBI or whoever but then backed out when he realized he was getting used. Then they went after him.
I think he is still pretty naïve/dumb and I don't think he is a threat to anyone except the deep state. Maybe he is safer in prison camp until the dust settles.