Previous Presidents had the number of their presidency though didn't they? I do think there are cases where people are looking too hard and making big stretches for links but why wouldn't Trump have 45 if his name is on the shirt? it's not like it says Champions or whatever.
Like I said I do think people look too hard for links at times but it's a break in tradition and Trump is hardly going to say "because I'm giving a shout out to Q followers" as his answer. Something like "Champions 17" would have made much more sense to me if you weren't going to go with "Trump 45".