Many of the Democratic candidates for president are simply not known nationally,. If the election were held today, Biden would trounce Trump. (for methodology see: https://politicaleye.org/2019/06/28/trump-the-loser/).
Prediction 7/1/2019
Biden: 391.6 electoral votes
Trump: 146.5 electoral votes
Although Kamala Harris got attention for her debate performance, based on the polls (which all are from before the debate) she would lose to Trump. She would win the popular vote but that does not get you elected. State level polling data that matches Harris against Trump is only available currently for 12 states.
Prediction 7/1/2019
Harris: 239 electoral votes
Trump 299 electoral votes
Bernie Sanders would beat Trump comfortably, getting 297 electoral votes compared to Trump’s 241 votes.
This seems like the other info I found earlier
This page seems like the other page here I was seeing earlier