I'm less concerned for a civil war akin to the one in our past between two formal states and armies, and instead more concerned about increased political violence and domestic terror groups. We already have severe issues with mass shootings and have seen increases in politically motivated attacks (e.g. Jan 6, the attack on the Pelosis, attacks on LGBTQ+ venues, etc.) and, what I find especially worrying, a lack of serious criticism and opposition from our politicians. Republicans often ignore or even justify many of these attacks (as by and large most are perpetrated by right-wing actors), such as with them making fun of the attack on the Pelosis and making up a conspiracy theory about it being a homosexual affair, and while Democrats have criticized these attacks, little is done to actual go after the political agitators causing them. Moreover, wider language regarding political violence has also become more extremist as at a recent CPAC, a prominent conservative (I believe it was Michael Knowles) went on stage and called for the "eradication" of the transgender community and has since defended himself by arguing he can't genocide transgender "people" if they aren't actually a group of people. This has come with little-to-no opposition from conservatives despite this language dehumanizing and practically calling for violence against transgender people.