Not since the Confederacy have we had open insurrection and today a DHS alert says this is a risk. Just how divided is the country today?
My prior post, E Pluribus Unum, indicates 2020 Presidential election results are NOT highly divisive. That same post asked if the 50-50 split in the Senate and the 221-211 split in the House of Representatives indicate historic divisions in Congress. This post will try to answer this question by looking at historical Congressional party splits.
Wikipedia's article on this subject, Party divisions of United States Congresses, presents historical data in length. Below is a graphic from this article showing Congressional party control since 1855 (click for expanded view):