that is a pretty extreme statement...
Trump is putting the Rust Belt states (trade, economy) and Northeast states into play, by his virtue of being a New Yorker. He doesn't need PA to win; he is rope-a-doping Clinton into spending resources into PA while he quietly develops a ground game in NY and CA.
I've said it before and I'll say it again: Trump will win a minimum of 45 states, and he'll be the first presidential candidate to exceed 100 million votes.