Traditional views of American politics tell us that the cities, the urban areas, are overwhelmingly Democratic in loyalty; that the suburbs, which blossomed after World War II, are Republican, as people escape the city and urban problems, and are heavily white; and that the exurbs, those areas much further away from the cities, are Republican, along with the widespread land we consider rural areas.
So as long as the Republican Party wins the suburbs, the exurbs, and the rural areas,a they can be competitive and win national elections.
But it is now apparent by statistics that the suburbs are rapidly turning Democratic, as they have become no longer white “flight” havens, but instead have become a mix of Americans of all races and religions and cultures, and sadly, poverty has come to the suburbs, in some ways almost as badly as in the cities, due to the Great Recession.
The Republican refusal to accept that poverty is not the fault of citizens, but of circumstance, and rejection of the concept that everyone should be entitled to health care, is having a long range effect on Americans living in the suburbs.
It is not just economic factors, but also social factors, such as the issues of gay marriage, abortion rights, labor rights, concern about the environment, education, and the recognition of the need to adjust to a changing American society, which is also helping the Democrats, as the Republicans come across as mean spirited, biased, prejudiced, uncaring about anyone except the wealthy, and refusing to recognize the demographic changes that have developed in suburbs, as well as the cities.
So a political party that thinks it can survive and prosper on the basis of winning the exurbs and the rural areas is a party in total denial, as while there are massive land areas where these people live, the percentages of population living in those areas is miniscule, compared to the larger population numbers in the suburbs, as well as the cities.
While many Congressional districts can be gerrymandered and give the Republicans greater influence than they should rightfully have in the House of Representatives, their agenda and public persona of their leadership insures that the cities and the suburbs will be majority Democratic for a long time, giving the Presidency and the Senate to the Democrats. In the long run, this guarantees that the future Supreme Court , and even the lower courts, will be heavily influenced by Democratic Presidential appointments, which are considered and approved by the Senate, where Democrats need to fight to keep control so that they can promote the agenda of Democratic Presidents, and resist a Republican House majority based on artificial conditions, that can eventually be turned over to a Democratic Party majority over time.