I genuinely hope that whomever is running against this guy has something more comprehensive

I never said a single thing about 1980 (although plenty of authorities cited in the Wikipedia article start with 1980). My question is where on earth you got this mid-’80s idea, much less the idea that it’s the “consensus from demographers”.

So your mid-80s thing seems to come completely out of nowhere.

The consensus from demographers seems to group millennials from the mid-eighties to early-aughts.