They aren’t legit polls. People won’t even say they are voting for Trump out of fear for their life because even wearing a MAGA hat makes them a target for violence.
Virtually every poll from the summer of 2016 to November’s election...indicated Hillary would win by millions of votes. None of that matters, if you win thirty key states.
Honestly, if a stranger calls you on the phone asking who will you vote for, do you even answer the phone, much less tell them you political views. There’s something wrong with anyone who does, and that explains why these results always favor Democrats.