This is mostly a battle of the white working-class vs the white middle class.
The Democrats produce most of the middle class, so they compete less often for jobs with Foreign nationals, people of colour, Latino's etc. The white working class have been getting poorer, with the richest 2% getting richer
No matter what happens in the build-up to the election, the working class are going to vote for Trump because he will give them a more white preferred status of made in America.
There are some flashbacks to Apartheid here. After world war 2 the Afrikaaner found themselves on average poorer than more recent European settlers, and some laws were to designed to improve the position of Afrikaaners at the expense of other races and even European settlers.
Seems the far-right in American has founded a group called the Proud Boys.
The look very working-class- like much of Qanon.
Trump has told them to prepare for war(the election).
If the Democrats are supposedly controlled by the far-left Antifa, then perhaps the Republicans are controlled by Proud Boys. (No in truth, both groups get shafted by either party after the election).
Biden at least says he does not support violence and distances himself from Antifa and any radical groups.
The Republicans do have other segments of society (e.g. Richest that want to pay less tax), or religious conservatives. However for the most part their support group is the white working class that believe Trump will give them a better economic deal .
They just don't know that if Trump was to win the next election, the richest 2% will get richer- and the rest will get poorer. They are disillusioned by the Whitehouse, but no one will shaft them like Trump.