After 20 years, data show dramatic changes in party alignment

In 2018, it’s commonplace to say that the Democratic and Republican parties represent two different Americas. But a new set of data this week shows some of the most significant gaps between the two major parties are growing wider.

The study of political partisanship from the Pew Research Center compares registered voters who self-identified as Republicans and Democrats in 1997 and 2017 and finds both are being affected by changes in the nation overall, but at very different rates. The net effect is that the two parties are in some ways headed in very different directions, demographically and culturally. CONT.

Dante Chinni, NBC News