We're over a 100 days out so obviously things can change but the polling numbers are absolutely brutal: https://www.realclearpolitics.com/epolls/2020/president/us/general_election_trump_vs_biden-6247.html

Trump's not going to win the popular vote so national polling isn't all too accurate of the electoral college which is all that matters, but the swing state polls look pretty ugly too.

Lots of public health experts have went on the record saying this Fall and Winter are going to be brutal from the perspective of public health and safety. Coronavirus is not going to go away by November and the CBO predicts a 10 percent unemployment rate by the end of the year. Can't campaign on eliminating coronavirus, and can't campaign on the economy.