In other words, each half of the country lives within its own echo chamber, only consuming what it wants to hear.

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So, I thought to echo that, the only way to present this is in Jim's own words.

BBC: Jim Mortram's Small Town Inertia

It is possible that the Obama administration is an ideological echo chamber in which only certain positions are permitted.

CENTERFORSECURITYPOLICY: An ally no more

Though Sprint supports more than a dozen devices on its fast, 4G network, including three phones, the Echo is a 3G-only handset.

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The only way to avoid this kind of echo chamber effect is to make a habit of consuming media from a wide variety of ideological perspectives.

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Politicians frequently echo the gun lobby refrain to only "enforce the laws on the books, " refusing to admit that there are very few laws on the books.

CNN: Commentary: Stop flow of U.S. guns to Mexico drug war

And all echo down the tracks from a time when trains were the only way to travel.

BBC: Europe's eight best night trains

Porjects like this are not only fun, but are a great way to show developers what can be done with The Echo Nest Platform.

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