WS: Changing demography also increases internal contradictions that may eventually bring down the Federal Entity in Washington (FEW) sooner than in 30 years. Since 1860 the FEW mainainted its hegemony by a mixture of force, dispatching the standing army it controls to subdue the renegade states, and a clever propaganda strategy that fuses civil rights with federal authority (which is "federal" in the name only - and in fact its is an imperial entity ruling over occupied or otherwise subdued states).
It is not a coincidence that the FEW gives a lip service to civil rights each time it needs ethnic minorities to fight its imperial wars. Lincoln did not give two shits about slavery, but ranting against it provided him with a convenient high moral ground in his imperial war against the confederate states, so he used it to rally his troops and dupe the star-eyed liberal even since.
As the FEW waged its Asian imperial adventures, it again relied on the people of color to do the fighting. However, learning from the experience of their British brethren who suffered from several nasty colonial uprisings staged by Africans who served in their imperial army, such as the Kenya Land Reform Army led by the WWII veteran General Dedan Kimarthi or the Mau Mau rebellion - the FEW decided not to chance it and dispatched its standing army to symbolically slap the wrist of a southern state - again reinforcing the mythical civil-rights-federal-authority connection that duped the bleeding heart liberals.
The bottom line is, however, that as the ethnic composition of the so-called "United" States change - so will the internal conflicts stemming mainly from income disparity, the increased demands on ethnic minorities by the FEW to serve as the cannon fodder in its imperial wars, and the military training and empowerment these minorities receive through their military service (who will do much more effective than sniping at innocent bystanders). I do not think the FEW will be able to sweep those internal contradictions under the rug indefinitely. Sooner or later internal cracks will appear, as they did in the x-USSR, x-Yugoslavia, or x-Czechoslovakia.
If that assessment is correct, demographic changes of the US population may be the force that will fuel the "state rights" movement which will weaken if not bring down the FEW (the history of the Civil War repeating itself twice, this time as a farce).
Wojtek