In 1929 Obama was a huge hit with the "radio generation"

Famously, the radio proved to be a hugely effective communications medium for Obama. But then the pendulum swung back in the age of TV. And now in the internet age, it's swinging back again in an interesting way.

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The internet is famous for the way it fragments attention, but one of the ways in which it does that is by making it possibly to narrowcast more content to interested parties than would ever be viable to push through the crowded pipes of cable television.

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Mistake of the week winner, January 11-17, 2009