Since the 1970s, the Republican Party has fallen increasingly under the influence of radical ideologues, whose goal is nothing less than the elimination of the welfare state — that is, the whole legacy of the New Deal and the Great Society. From the beginning, however, these ideologues have had a big problem: The programs they want to kill are very popular. Americans may nod their heads when you attack big government in the abstract, but they strongly support Social Security, Medicare, and even Medicaid. So what’s a radical to do?

The answer, for a long time, has involved two strategies. One is “starve the beast,” the idea of using tax cuts to reduce government revenue, then using the resulting lack of funds to force cuts in popular social programs...Arguably more important in conservative thinking, however, was the notion that the G.O.P. could exploit other sources of strength — white resentment, working-class dislike of social change, tough talk on national security — to build overwhelming political dominance, at which point the dismantling of the welfare state could proceed freely. Just eight years ago, Grover Norquist, the antitax activist, looked forward cheerfully to the days when Democrats would be politically neutered: “Any farmer will tell you that certain animals run around and are unpleasant, but when they’ve been fixed, then they are happy and sedate.”

O.K., you see the problem: Democrats didn’t go along with the program, and refused to give up. Worse, from the Republican point of view, all of their party’s sources of strength have turned into weaknesses. Democratic dominance among Hispanics has overshadowed Republican dominance among southern whites; women’s rights have trumped the politics of abortion and antigay sentiment; and guess who finally did get Osama bin Laden.