This may explain the extraordinary gap between the economies—and the expectations—of coastal and interior California. The higher energy prices and often draconian regulations that prevented California from participating in the industrial renaissance are hardly issues to companies that keep their servers in cheap energy areas of the Southwest or Pacific Northwest and (think Apple) manufacture most if not all of their products in Asia.

In the process the Democrats, once closely allied with industry, are morphing into a post-industrial party. Manufacturing in strongholds like Los Angeles, long the industrial center of the country, continues to erode. In a slide that started with the end of the Cold War, Southern California’s once-diverse industrial base has eroded rapidly, from 900,000 jobs just a decade ago to 364,000 today. New York City, which in 1950 boasted 1 million manufacturing jobs, now has fewer than 100,000. Overall, manufacturing accounts for barely 5 percent of state domestic product in New York and 8 percent in California, compared to 30 percent in Indiana and 19 percent in Michigan.

This divide could become decisive in the election. In contrast to advances in energy, autos, and homebuilding, which produced good blue collar and middle-skilled jobs, the benefits of the current tech boom have been limited, both in terms of job creation (outside of the Bay Area) and increased productivity, for the vast majority of voters.

This underlying economic conflict is redefining our politics less along lines of ideology and more in terms of interests. Increasingly states that follow the Obama line on energy, such as New York and California, are not contestable for Republicans. But elsewhere—beyond the coasts—there may be greater resistance.