First number is current RCP average for that state. Second is 2016 final poll. Third number is actual results. Last is adjusting 2020 polls by that amount.
AZ: Biden at +2.7. Trump +4.0 in 2016 polls. Trump -0.5 in 2016 voting. Adjusted 2020: Biden +3.2 (2.7 + 0.5)
FL: Biden +2.9. Trump +0.2 in 2016 polls. Trump +1.2 in 2016 voting. Adjusted 2020: Biden +1.9
GA: Trump +0.1. Trump +4.8 in 2016 polls. Trump +5.1 in 2016 voting. Adjusted 2020: Trump +0.4
MI: Biden +7.2. Clinton +3.4 in 2016 polls. Trump +0.3 in 2016 voting. Adjusted 2020: Biden + 3.5
NC: Biden +3.3. Trump +1.0 in 2016 polls. Trump +3.7 in 2016 voting. Adjusted 2020: Biden +0.6
NV: Biden +5.2. Trump 0.8 in 2016 polls. Clinton +2.4 in 2016 voting. Adjusted 2020: Biden +8.4
PA: Biden +7.0. Clinton +1.9 in 2016 polls. Trump +0.7 in 2016 voting. Adjusted 2020: Biden +4.8
WI: Biden +6.3. Clinton +6.5 in 2016 polls. Trump +0.7 in 2016 voting. Adjusted 2020: Trump +1.1
So, in this exercise spurred on by the article posted by the OP, we've gifted Trump the same polling errors from 2016. Polling errors work both ways. However, for fun, we've just given Trump every polling error he received in 2016. This did include one battleground state, Nevada, where Trump looked like he would win and Clinton did instead.
What would this map look like, given that we've already gifted Trump these polling errors?
Something like this:
Now, what if we gave Trump ANOTHER 2.2 points of polling error nationally. So, instead of polls being off nationally by just 1.1 points like in 2016, we give him 2.2 points after all those adjustments up there that favor Trump. What does THAT look like?
In that last case, Trump could possibly get a state like Arizona to overturn the will of the people and maybe have the Republican Governor, state Senate and State House simply allocate Electors to him, and he'd be at 270.
As of this moment right now, Trump needs the same polling errors as last time to all be in his favor again and then another 2.2 points on top of that and then maybe get a state that went for Biden to override Electors to benefit him.