One reason for GOP control of the House is deliberate gerrymandering. Another is partisan clustering, that is, the tendency of Democrats to huddle up in cities, where they create huge margins for their party, which means wasted votes.
A new Pew poll confirms that Democrats and Republicans like to live in different kinds of places.
Our studies of political polarization and partisan antipathy both found that the disagreements between Republicans and Democrats go far beyond political values and issues. They also have markedly different preferences about where they would like to live. Most Republicans (65%) say they would rather live in a community where houses are larger and farther apart and where schools and shopping are not nearby. A majority of Democrats (61%) prefer smaller houses within walking distance of schools and shopping.