Things seem to be returning to normal after the era of early 20th century unified thinking that accompanied mass media like the radio and television that seemed to produce electoral maps like this. Evidence suggests that the internet has bred polarization, which seems to be a return to the way things had been when the mass media was dominated by newspapers. There is a rather obvious low point. But also stories of the shenanigans such as Speaker Reed destroying the disappearing quorum strategy by counting people apparently present as present even if they did not declare themselves so in 1890:
Reed's solution was enacted on January 28, 1890 in what has popularly
been called the "Battle of the Reed Rules". That came about when
Democrats attempted to block the inclusion of a newly elected
Republican from West Virginia, Charles Brooks Smith. The motion to
seat him passed by a tally of 162–1; however, at the time, a quorum
consisted of 165 votes, and when voting closed Democrats shouted, "No
quorum," triggering a formal House quorum count. Reed began the roll
call; when members who were present in the chamber refused to answer,
Reed directed the Clerk to count them as present anyway. Startled
Democrats protested heatedly, issuing screams, threats, and insults at
the Speaker. James B. McCreary, a Democrat from Kentucky, challenged
Reed's authority to count him as present; Reed replied, "The Chair is
making a statement of fact that the gentleman from Kentucky is
present. Does he deny it?" Unable to deny their presence in the
chamber, Democrats then tried to flee the chamber or hide under their
desks, but Reed ordered the doors locked. (Texas Representative
Constantine B. Kilgore was able to flee by kicking his way through a
door.)
Which paints a picture of the sort of circus Congress had been back in those days.