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Sharp swings in attitudes have left America divided in terms of education. A comparable situation exists also in the UK as areas with more education access have separated from areas with less access to higher education. As the WSJ analysis points out at one time social cohesion prevailed in the postwar years till 1970 with educational attainment playing a small part leaving social cohesion intact. Even in the period 1970-1990 when there was a shift for college educated women to prefer Democratic Party and white men without a college degree to prefer Republicans this was not a significant gap. The Democratic Party appealed to less educated union voters in manufacturing industries as well as it did with college educated men and women. This gradually fractured during the Clinton and Obama administrations as the Democratic Party  moved closer to the higher educated and drawing more support from new tech industries than manufacturing. Nowhere is this more evident  than in the way college educated women have shifted to the Democratic Party and white men without a college degree have moved to the Republican Party.

Swings of different types are normal in elections and politics. But swings purely based on education are rare in American politics and not healthy for the democratic system of government. As the analysis from WSJ/NBC News shows college educated women favor Democratic Party by 33 percent margin. And the swing is even deeper for white men without a college educated degree who favor Republican by a 42% margin. This is the situation before the 2018 U.S. Congressional elections. The combined group of college educated women and white men without a college degree make up 40% of the U.S. voting public.

This makes each group unreachable for the other party, a situation unimaginable for many of America's leaders if they would be living today- from presidents Harry Truman and Dwight Eisenhower, John Kennedy and Lyndon Johnson. White voters make up 70% of the electorate, and a situation where they would be unreachable for Democrats would be unthinkable or unimaginable for Truman, John Kennedy. And Eisenhower would also find it unimaginable that he would have to writeoff college educated women in his campaign. 

By returning the Labour Party to its roots Britain is combatting this tendency for fracturing of social cohesion. In the way the UK's Blair administration moved away from Labour party's roots in manufacturing and the trade unions, the Democratic administrations under Clinton and Obama  moved away from manufacturing industries and the trade unions.  

Most of the postwar leaders of the stature of Eisenhower and Kennedy would have seen such a situation as a significant failure in political leadership.