New Hampshire and Iowa play big roles in choosing presidential candidates

White, rural and homogeneous. New Hampshire and Iowa play big roles in choosing presidential candidates but don't look much like the rest of the country. A better bellwether might be Illinois. It's the most average state.
Illinois is the fifth largest state, with a big city in Chicago, rolling countryside in the south and a lot of sprawling suburbs. And it has Peoria, which, it turns out, really is a barometer of America's preferences. Many companies continue to use the city in central Illinois as a test market, taking literally the adage about how things play there.
Illinois' racial composition matches the nation's better than any other state. Education levels are similar, as is the mix of industry and the percentage of immigrants. Incomes in Illinois are a little higher and the state is more urban the rest of the nation. But the age of the population is very close to the country's mix of minors, seniors and those 18 to 64.