We're still three months away from election day, so the situation could change.
However, the polls consistently show Biden with a lead over Trump that can't be ignored. This is the case nationally as well as in the swing states that won the election for Trump in 2016.
RealClearPolitics - Election 2020 - General Election: Trump vs. Biden
Current Polling Averages:
National: Biden +7.4
Florida: Biden +6.2
Wisconsin: Biden +5.0
Michigan: Biden +7.8
Pennsylvania: Biden +6.0
North Carolina: Biden +4.7
What would have to happen for the polls to shift substantially enough for Trump to pull out a win?