Since we are talking about democracy, I think this might be relevant...
From:
https://www.businessinsider.com/civil-war-experts-indicators-us-on-brink-of-conflict-historian-2022-1Though the idea of another civil war in the near future might seem far-fetched to many Americans, people who study such conflicts may disagree, according to Timothy Snyder, a history professor at Yale University.... he feared the US might not survive if former President Donald Trump were to run again in 2024.... He cited the high degree of polarization, beliefs in alternative realities, and celebration of violence. As an example of the latter, he pointed to some who reflexively praised the actions of Kyle Rittenhouse...From:
https://www.theguardian.com/world/2022/jan/04/next-us-civil-war-already-here-we-refuse-to-see-itThe legal system grows less legitimate by the day. Trust in government...is in freefall, or, like Congress, with approval ratings hovering around 20%, cannot fall any lower. Right now, elected sheriffs openly promote resistance to federal authority...militias train and arm themselves in preparation for the fall of the Republic.... doctrines of a radical, unachievable, messianic freedom spread across the internet, on talk radio, on cable television, in the malls....The Capitol police have seen threats against members of Congress increase by 107%.
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Most of the American right have abandoned faith in government...Their politics is, increasingly, the politics of the gun. The American left is slower on the uptake, but they are starting to figure out that the system which they give the name of democracy is less deserving of the name every year. An incipient illegitimacy crisis is under way, whoever is elected in 2022, or in 2024.
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The right is preparing for a breakdown of law and order, but they are also overtaking the forces of law and order. Hard right organization have now infiltrated so many police forces – the connections number in the hundreds – that they have become unreliable allies in the struggle against domestic terrorism.So is it possible for the U.S. to have a second civil war? I've seen news clips of pro-Trump supporters talking about "getting guns" to fight the democrats. And we've seen the pictures of 2 Trump supporters wearing "Rather russian than democrat" t-shirts (while at the same time claiming they are "patriots").
If civil war does break out, it won't be like the 1800s (where a bunch of states seceded). Instead it will be messier/more chaotic. If Republicans win later elections using shady tactics (like they tend to do), its possible that you will see wide-scale protests that get out of hand. The police will use abusive tactics, protesters will decide "If cops are going to 'bust heads' I'm going to drop any pretense of peaceful protest and start going armed." If Democrats win, right wingers will replay the January 6 terrorist attack (fueled on more delusions and lies), with many/most cops dropping any pretense of stopping the terrorists.