What's worrying is that it always strikes me as the Roman Empire in the last days of the Republic. Vast sums being spent to buy elections, a powerful few getting very rich off wars and the government grinding to a halt, unable to deal with the problems facing the nation.
Just before Caesar came along and get into a fight with the Senate. Congress' approval ratings are so low it really wouldn't take much for a powerful populist movement to challenge the constitutional makeup.
The other scary thing is how the Roman Empire ended... IIUC (and that's a capital I, btw), a group of Visigoths penetrated the capital, killed a bunch of powerful rulers and left... the rest of the country couldn't handle itself and it led to the Dark Ages for centuries... The scary thing is how close the events of 9/11/2001 are to those very circumstances...
...Although a part of me fantasizes about the freedom which existed in Dark Ages....
After the administration was split (a few different ways were tried, settling on eastern/western halfs), the western half declined, failed to stop incursions from the Germanic tribes and eventually Rome was sacked a couple times.
The eastern half thrived, and even reconquered Rome and Spain, under Justinian. This was a continuation of the exact same government, no fall from power, just a loss of some territory. They lost Rome back fairly quickly and were controlling various parts of the Eastern Mediterranean, Eastern Europe, the Middle East and North Africa on and off until they entered terminal decline after 12-1300 or so, and Constantinople finally fell to the Turks, with the last Emperor dying in the battle in 1452.
Whats somewhat sad about the western half of the empire is that the final 100-150 years were just riddled with things that were entirely avoidable and other stupidity like the treatment of the Gauls.
But they had a much harder time dealing with the huge influx of displaced Germanic tribes due to the (Mongols iirc?). The western half of the empire started down the road to things like castles and other behavior like large estates that directly fed into the middle ages. Diocletian and his division of things into dioceses also helped, but I think once they started down the path of dual Augustus/Caesar rule it was bound to fail due to the inevitable clashes of personality.
