The Divided States of America

Reading the nonstop coverage of what may well be a close presidential election, one might be forgiven for thinking that political competition is alive and well in America.
But look at the majority of states and congressional races, and a different picture emerges: In most places, meaningful two-party electoral competition is nonexistent. Rather than being one two-party nation, we are becoming two one-party nations.
...
Consider some numbers. The House, the supposed “people’s chamber,” is a sea of noncompetition. Out of 435 seats up for election this year, just 25 are considered tossups by The Cook Political Report. In 2014, 82 percent of House races were decided by at least 15 percentage points, including 17 percent that were not contested by one of the two major parties.
...
While gerrymandering may explain some of the noncompetitiveness of House races, it can’t explain the Senate or the Electoral College. No amount of nonpartisan redistricting can overcome the fundamental disconnect between place-based, winner-take-all elections and polarized, geographically separated parties.