Look at the "270 to win" site.  They already have Biden projected to win 278 electoral college votes.  That includes states which are leaning blue and states which are solidly blue.  All you have to do to get Biden to 318 is to also put Arizona and Florida in his corner as well.  Biden has been showing a steady lead in both for a while now.  Biden could also win states such as North Carolina, Iowa and Georgia...
Biden's path to 270 is wide open with several scenarios in play, while Trump's path is narrow and closing.  Wisconsin, Michigan, Minnesota and Arizona are slipping away.