The typical American has come to reject their "getting politically involved" ever since the end of the Vietnam War era. At that time America split between the more or less disconnected (from their government) and the politically connected (typified by those who even knew how local government and state governments operated). The average American voted every four years in fewer and fewer numbers expecting that nothing would change and "it is as it always is, so why bother?"
Then one day the word gerrymandering became commonplace. Say wha'? On another day we watched as government did little to stop American corporations laying off tens of thousands one after another and moving to China and elsewhere. Then we watched corporate raiders plunder pensions and saw pensions disappear entirely for millions. Then we saw exorbitant health insurance costs become personal as a result. Then we saw Bush/Cheney give two trillion in tax cuts and then add on even more when they saw that they could get away with it. Then we saw the bail outs that foreclosed on the little guy and made him pay taxes to bail out the banks that screwed him.
How did our political system arrive at this political collapse you asked?
We have no idea is the answer!