The polling is based off of the previous elections, which were far closer to standard conditions than this one. The extremism of one candidate is breaking traditional voting norms. Polling always skewed towards republican, and they've been underperforming massively in the last few years.
I could even go so far as to say "the demographics on which they're basing the current trends no longer apply", but I really don't have to. Nor do I have to say "mainstream media is complicit in platforming the fascist, and has ALWAYS made it into a horse race.".
Did you vote? Cool, take a break. Maybe unplug till wednesday. You're done, hit the showers; Good hustle kid.
If you ain't voted, maybe make your plan to do it, make sure you give yourself plenty of time. Then go home, have yourself a cuppa, maybe a pint, and read a book till wednesday.
When we vote, we win: and my friends; there has been VOTING! Record breaking voting.