Polarization (Social sciences) - Political aspects - United States.

Demography, politics, and partisan polarization in the United States, 1828-2016 by: (Electronic resources)

Can America govern itself? / by: (Language materials, printed)

Polarization (Social sciences)- Political aspects- United States.

United States- Politics and government- 21st century.

Geographical Information Systems/Cartography.

Human Geography.

Demography.

Political planning- United States.

Political culture- United States.

Representative government and representation- United States.

Political Science.