Thomas Edsall ponders its past and future:
Given the scope of the demographic and ideological transformation of the United States over the last six decades, it’s interesting that the two-party system has not imploded. In the face of sustained centrifugal upheaval — including a proliferation of religious affiliations, the enfranchisement of substantial minority populations, rising levels of economic inequality, and the belief among a plurality of voters, 44 percent, that our economic system (capitalism) and the religious identification of three-quarters of the electorate (Christianity) are not compatible — we still are a nation of Republicans and Democrats.
More so than ever actually. Perhaps it's the only truly tribal option left.