His entire response could be boiled down to "Trust me, bro".
I get the feeling he knows he cannot defend his position based on either commonly known information or on reasoning about the situation. So he has to purport to have special information that most don't. And that special information, which you cannot have, is enough to turn everything around. But he also won't give you enough information to independently verify. He won't tell you which campaigns he did these things for, which politicians he worked for. But they were top men. Top. Men.
Thank you for teaching me the party of Science and Data.
If you were truly concerned with "Science and Data", you would realize that vague, unverifiable anecdotes are only persuasive to those who are already persuaded. They are not a valid way to make a point.