2020 (and probably 2018) is when the Democrat Party became the party of billionaires and digerati, while the Republican party represented the working class, manufacturers, farmers, etc. Most rank-and-file private unions (plus police and fire) polled strongly for Trump and Republicans.
It's almost a 180 turnaround from the days when the Democrats represented the "common working man" and the Republicans were the party of rich CEO's and business owners.