From one presidential election to the next, the battleground states that make — or break — the election remain largely the same. But that doesn’t mean there aren’t gradual (and sometimes, not so gradual) shifts underway.

We zoomed in on how 16 battleground states have voted relative to the country as a whole since 2000 — or how much more Republican or Democratic they are relative to the nation1 — and we found an electoral map undergoing a series of changes, some steady and others abrupt.

Read More →