There are massive protests actually planned for this weekend, but what is not as obvious is the boycotting that has been going on for the last several months. Protesting is not generally enough as long as people keep spending in the same places.
The United States has always been close to civil war, throughout its history, because its ideals and its behavior don't match -- literally from the Revolutionary War onward, the country has been daring falling apart. However, now that we are in the nuclear age, and 350 million in population, with a land mass this broad, there is no way to have a civil war, and disrupt the economy that bad, without it being the end of the country and quite a lot of the economy of the world. That is more or less understood ... more or less. What can happen, though, and is happening, is that the United States will quietly regionalize, and in essence become three different realms in what will be an uneasy peace by necessity. If this happens, some local regions will indeed slip down to a developing-world state with less help from the others ... and already, this is happening.