<iframe src="http://www.npr.org/player/embed/96263173/96263171" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
The McCain campaign's charge that Barack Obama has socialist leanings has put the spotlight on a word relatively uncommon to modern American elections. Linguist Geoff Nunberg explains how the "S" word was used in the past — and why it's come up now.
NPR thanks our sponsors
Become an NPR sponsor