Exactly. Trump is going to try to lather the base up with immigrants (see Somali bit), law & order (see dead soldier bit), trans bathrooms, I lowered your taxes, gun control, and infanticide.https://www.propublica.org/article/we-f ... nistration
I really don't think it's hard to make the case that Trump has outsourced government to the "swamp". Obviously none of this matters to the die-hards, but I think you cut into his rural margins with the message of Trump being a corporate/industry president. The democrat has to figure out how to ignore the culture war stuff and just talk political-economy.
Democrats can make headway on health care, general national security (failure as commander-in-chief, sending mercenaries to SA), and being in the corner of big business and pay for play.
In a lot of ways if you just kept Syria/ISIS/Saudi Arabia in the limelight having a candidate that was an office in the military running for the Dems would be pretty big boon.
You've got a year until the general, and when talking about wealth taxes to pay for green energy plans or MFA or college tuition, all the rust belt voters see is a decrease in their take home pay without a real benefit to them. Long term, that may be what those coveted rust-belt voters and their neighbors need but it's pretty obvious that they're not buying yet. So instead you look at Biden, who isn't trying to change anything dramatically, and won't be the drunk, embarrassing Uncle that Trump is spouting nonsense or conspiracy theories and trying to play tough guy.