Social and cultural shifts have profoundly impacted the dynamics of political parties in the U.S. The Democratic Party has become more diverse over the years, while the Republican Party has remained largely uniform in its cultural makeup. This difference is crucial because the Republican Party has historically depended on a base of white Protestant voters, who for a long time were the predominant group in American politics and culture.

As the demographics of the electorate change, white Protestants now represent a minority, and their numbers are steadily decreasing. In response to this decline, these voters have solidified their support for the Republican Party, creating a cultural homogeneity that contrasts sharply with the Democratic Party's evolving diversity. This shift underscores the challenges faced by the GOP as the political landscape transforms.