This guy’s name is Craig Dillon. He runs a company that makes online videos including for conservative politicians. Calling himself a ‘former advisor’ seems a stretch but he appears to have a casual relationship with the truth. He has used the name Thomas Corbett in the past to issue take-down requests for videos claiming that Craig was his client. When confronted about this Craig claimed Thomas was a relative of his and never claimed to be his lawyer. Not surprising that he is Trump fan. There were also some other allegations but no charges.
Now he is in Washington peddling nonsense to Fox News. He has removed several social media accounts after this clip went viral.
What this highlights for me as a non-American is that Tucker appears to have done zero research before this piece and does nothing to hide his total ignorance. In Europe, the interviewer would have known the facts of the situation and been prepared to challenge the guest.