This Nebraska congressional district could be the key to the presidential election

If the vote is close, swing states will matter less than a few hundred thousand voters in the middle of the country

For Joe Biden and Donald Trump, the road to the White House runs through battleground states clustered along the Great Lakes, and in the fast-growing sun belt" of the south. But if the election turns out to be extremely close, the two candidates' fortunes may hinge on a few hundred thousand voters clustered in a single congressional district in the middle of the country.

This lesser-known front can be found in Nebraska, one of only two states in the country, along with Maine, that allocate a portion of their electoral votes by congressional district, rather than giving all of them to the winner of the state.