That's nothing new. He blocked me when I kept pointing out his bloviations on why Trump won in 2016 didn't stand up to scrutiny.
(He claimed it was because Democrats lost white people, but I pointed out that Trump won a smaller percentage of White People than Romney did. What put Trump over the top was that so many blacks stayed home, and so many other people wasted their votes on third parties.)
I pointed out the surveys and percentages that blew holes in his silly premise, and he got very upset and blocked me.