Yglesias makes a sometimes overlooked point about how political fortunes shift:
I think it’s very possible that Democrats could “gain so much power” that they implement at least some of their “crazy plans” and that the people, rather than revolting, will just turn their attention to other issues. For example, many Americans feels anxiety about their health insurance status. And the majority of these people vote for Democrats. But if Democrats deliver a health care reform plan that assuages those fears, those voters may start voting more on their hatred of abortion or love of torture and bring Republicans back into power.