ME is one of only two states in the country where millennials are actually more Republican than old people, the state ranks near last in the country in growth, is one of the least densely populated, is mostly rural and is the whitest state in the country at near 95%. It also trended and swung R in '16 (it had one of the largest R trends in the country in '16) and the GOP already flipped one EV.
You want to tell me what trends favor the Dems here, I'm all ears.
What is the other state in question?
Iowa
Given the vote results, it seems virtually impossible for this to be true in Iowa. If you looks at Census Data for Iowa for % over 65. The counties with the lowest % of 65 and over, the metro and university counties, Polk, Dallas, Linn, Story, Johnson. Biden won them all by 14 points plus except Dallas which is lost by 2. Conversely, all the rural counties in Iowa have very high concentrations of over 65 and of course he lost all the rural counties usually by large margins. It would take some seriously contorted voting patterns to make this happen.
It's more likely that the exit polls are basically crap.