I think the polls are correct this time. And thankfully, Trump’s team believes in poll numbers seen so far. Case in point - they have sharply increased ad spending in Iowa (where he won by 10% in 2016) and Georgia (another comfortable win in 2016), both states where polls show he is tied.
The election is 4 months away... he’s got to start advertising sometime.
I can’t imagine anyone who voted for him last time changing their mind, and I personally know many democrats who have said they’ve had enough of their party and WERE happy with the economy under Trump, and see the Dems as at fault wasting 3 years.
The polls are fake news.