I hope you are right. I'm not certain you are.
I see political movements as having life cycles. They start out as rebellion against a stagnant prior approach. They solve real problems, and are much closer to answering the needs and moods of the people than what came immediately before. Still, such movements are prone to stagnation and a sense of entitlement by the participating politicians. There is also a drift of 'ever so much, more so.' If FDR did well with safety nets, by the time we got to LBJ we had entitlements. If Reagan thought government to big and that tax cuts were in order to counter LBJ's excesses, how long can his heirs promise tax cuts and have the result shift from much needed trimming to gutting the core?
I'll take it as given that the Bushes took Reagan's quite worthy and appropriate for its time approach too far. I'll take it as given that the Reagan Bush Bush degeneracy has gone on long enough, that a new arch of politics is called for.
This doesn't mean that everyone senses this. There is still the potential for inertia.
The first level is the people. To many, 'liberal' is still a dirty word. They have vague impressions of the worst aspects of the awakening, and block out the positive aspects of what was achieve by the GI generation. They remember riots, tax and spend, and professional welfare mothers rather than the energy and big successes... containing communism, Apollo, and the post war infrastructure rebuilding. Even the social changes pushed in the 60s have many positive merits, from civil rights to women's rights to environmental awareness. Many refuse to see it. Many do not want to see big government attempting big things again. The problems of the cascade can still be denied. Many can still refuse to see. They just have to see 'liberals' through the deeply distorted lenses of stereotype to avoid living in the real world.
In short, the election is not a gimme. McCain is still in it.
The other level is the politicians. While the Republicans have been the party of the Robber Barons since their beginning, either party will get fat dumb and happy after a long stretch in power. I'm still getting a sense, from both parties, that one can fool most of the people most of the time. There is no urgency to serving the people. Gathering campaign dollars and smooching with the big shots is still perceived as the more important aspects of politics. I don't know that the Democrats are significantly different in this respect from the Republicans.
There are not enough powerful industry leaders pushing to profit from a transformed economy. I'd argue that the Revolution was started in Boston by shipping interests who wanted profits going to Boston rather than London, and thus disliked the colonial imperialism thing. As the Civil War approached, there were many who wanted the federal government to do more to help develop industry, and to open up the west. Prior crises have often featured progressive industries wanting to transform the culture for their own profit motive. I'm not sensing a lot of this today.
And there is the diversity of issues... war, energy, economic, cultural, ecological... Without central defining issues, it is hard to get into focus. There is much to be done, and much it needs doing, but there is no defining sound byte to rally behind.
Anyway, I don't see it as a done deal. I don't know that we will see a progressive president with a solid mandate. I don't know that Congress is apt to be shaken out of its inertia. I do agree that the cascade seems to be cascading. If the economy continues down hill and Iraq remains Iraq, the ice might indeed break.