Just a few comments on where the left has got us:
The Welfare State has destroyed the black underclass, by offering welfare benefits to single moms, driving men out of the households. The result is a criminal underclass, where young boys are without father figures, and grow up to engage in violence like women, but with men's strength (rap and ghetto culture).
Social progressivism has led to ever-increasing budgets for entitlements, leading the government to bankruptcy and insolvency.
Nanny-state laws over-regulate small businesses, so that only the huge corporate concerns can afford the lawyers needed to navigate the labyrinthine regulations.
The producers and makers (typically 'evil' white males) are demonized, while the unproductive moochers are pedastalized.
No Fault Divorce destroyed marriage, leading to greater unhappiness, even amongst those who stay married, than 'oppressed' women from the 1950s.
That said, none of this is going to stop any time soon - the US is like a car racing down a mountain, the Dems are pushing on the gas pedal, while the Reps are pushing on the breaks - but nobody's putting things in reverse. Year by year, the big government machine gets bigger, more unwieldly, under the control of Civil Service who are unelected, and unnaccountable (the President has, basically, no real power).
Things are going to crash, sooner or later, and voting isn't going to change that; I just find it amusing that people who support leftism are advocating for their own hell on earth. Not that they're making a difference, mind you - like I said, the machine has a mind of its own - but it's ironic, nonetheless, and provides good opportunities for schadenfreude.
As for the misguided and impotent tea parties? For those dumb (but honest and hardworking) people I feel pity.