Well, the one I'm most concerned about is the embrace of democratic socialism by voters under about 30 years old. Marxist ideology has become increasingly appealing to that demographic and is a significant component in the way the DNC has appealed to them.
Ok. The reason I asked is I'd just read an AP poll that showed Trump himself as the biggest issue for two-thirds of the voters. It's just one poll, but it came closest to my own opinion that we're voting mostly for or against Trump, with Biden and other issues secondary. I do agree socialism is one of those issues.