Trump is running virtually unopposed yet Trump just broke the record for voter turnout by an incumbent President in New Hampshire nearly doubling Obama's votes. In Vermont and Minnesota his totals were the highest in 40 years. In Maine he got the highest totals since Reagan. In Colorado his turnout was greater than the last 3 primaries COMBINED (though they did change the format). In Texas he got more votes than the top 4 Democratic candidates combined. He has really motivated his base and unified the Republican voters behind him. But that's not all he's doing...
25% of Trump rally's are now being attended by Democrats ~15% of whom didn't vote in 2016. His rally in Nevada had registrants by 27% black and latinos, 32% who didn't vote in 2016. He not only electrifies his base supporters who actually go vote, he appears to be peaking the interest of new voters. In 2016 Trump got 8% of the black vote and 28% of the latino. In 2020 I think he breaks 10% on blacks and 30% on latinos. If he does that this could be a landslide election of epic proportion.
On the opposite side, the Democratic party is fractured. Sanders supporters don't appear willing to vote for anyone but Bernie and Biden supporters won't vote Sanders. At this point, the DNC is pushing Biden so that they can minimize the impact on down ticket candidates. Don't be surprised if the Republicans gain seats in both Houses. Joe Biden IMO has very little chance of beating Trump without a blue wave of black votes. In the current economy, I just don't think that black voters are going to be all that motivated to go vote for Joe Biden. They weren't with Hillary Clinton and they certainly aren't voting for Bernie Sanders. I think enough of them will just sit this one out.