Everyone I know either refuses to talk to pollsters or they lie to them. Look at 2016. The polls mean nothing.
There are polls that matter. Those are the polls done by each party, and candidate. They know exactly where they stand.
Example. Hillary knew she specifically had trouble in PA, MI, and WI. She campaigned there in her waning days of the campaign. And she knew days before the election, she was going to lose, and cancelled the fireworks show she had planned for her victory. They know.