For the first time since Barry Goldwater made the effort in 1964, the Republican Party is taking a run at overturning the consensus that has governed U.S. political life since the Progressive era.

Obama is defending a tradition that sees government as an essential actor in the nation’s economy, a guarantor of fair rules of competition, a countervailing force against excessive private power, a check on the inequalities that capitalism can produce, and an instrument that can open opportunity for those born without great advantages.

Today’s Republicans cast the federal government as an oppressive force, a drag on the economy and an enemy of private initiative. Texas Gov. Rick Perry continues to promise, as he did last week during a campaign stop in Davenport, Iowa, to be a president who would make “Washington, D.C., as inconsequential in your life as he can make it.” That far-reaching word “inconsequential” implies a lot more than trims in budgets or taxes.

The GOP is engaged in a wholesale effort to redefine the government help that Americans take for granted as an effort to create a radically new, statist society.