If Biden wins:

• Rapid increase in illegal entries from Mexico starting immediately when Biden takes office (January 2021?)
• Whatever is left of historical Confederate or slaver statues go first. From there the historical revisionism quickly spreads (the Founding Fathers will survive Biden's term and will be some of the last to go, but even they only have decades at most).
• Gun sales massively increase in response to rightful fears about pushes towards greater gun control. Any/every shooting spree that occurs will continue being used as ammunition to sway public opinion peace-meal to a pro-disarmament stance.
• Infighting within the Democrats begins almost immediately (probably before Biden takes office, groups like Fox News focus on how weak/divided Biden's govt is, on his dementia or whatever he has, etc).
• Biden doesn't last a full-term, probably resigns due to pressure from the progressives (someone like AOC might be just old enough to stand by 2024). Both they and the GOP attack him constantly over his gaffes, past comments, etc. (politics will largely be an 'I'm less racist than you' contest, with the GOP focused on 'based blacks', 'Hispanic family values', etc.).
• Hostility to White Democrats generally increases. The Democrats have increasingly little need for them.
• 'Cuckservatives' proclaim they'll be able to 'rebuild' the GOP because 'Trumpian populism' somehow 'ruined' it. No one cares and neocon/National Review-style conservatism continues to die out. GOP wouldn't have won in 2016 without Trump anyway.
• Sites like AmRen, Counter-Currents, etc. probably deplatformed by 2024 (the ones that aren't are probably compromised).
• COVID continues well into Biden's term, but eventually becomes a non-issue (global herd immunity sadly seems the only way out). Left-liberals have a lot of blood on their hands (travel bans [remember their reaction to Trump banning travel even from Europe?] are 'racist', cracking down on BLM protests is 'racist', not letting people return from overseas is 'racist', etc.) Strangely, nobody calls them out on the fact they're the only reason why this pandemic has gotten out of hand.
• Opiate problem massively worsens. More stories of whole towns being 'decimated', etc.
• Trump family leaves the country to avoid being treated like Assange. Perhaps he has enough dirt on key Democrats to be left alone, if not, they're going to have him jailed to appease the rabid mob. Alot of wealthier Americans simply leave—for real, not like those clowns who said they'd 'leave if Trump wins', yet are still American today.
• Putin bad. Nothing actually happens with Russia other than sabre-rattling. Nonetheless, Russophobia becomes entrenched in American politics.
• Collective insanity (rename this brand, change that label, stop using that bigoted word, start using this new word, everyone is -ist and -phobic, 'cancel culture') ramps up. More Leftists fall afoul of the mainstream and get salami-sliced out of the Left (hah... too bad for RadFems, etc.) but it does nothing to diminish their power.
• Groups like BLM act with even greater impunity. This will even include arson, murder, etc. Remember the woman shot in the head recently for saying 'All Lives Matter'? And a lot of people commenting on her Facebook page that she 'deserved it'? That's going to get a whole lot worse these coming years.
• They'll push for changes to things like the Electoral College (whatever worked to Trump's favour in 2016 they'll want gone).
• Companies tow the line or go broke, but if they get too woke, they also go broke. This kind of unstable social situation is obviously 'bad for business' and will have obvious economic impacts. The Democrats will do nothing to restore American manufacturing (unlike Trump, who at least put some effort into it).

If Trump wins re-election (is Kanye West still standing, which would help Trump?) much of this (COVID, opiate problem, deplatforming) will happen regardless. Let the others speculate about a second Trump term.