In this article, a noted linguist reflects on his tumultuous foray into politics. For years George P. Lakoff has been at the center of some of the biggest intellectual disagreements in linguistics (most famously with Noam Chomsky) and has helped create an important interdisciplinary field of study, cognitive linguistics, that is reshaping people's understanding of the complex relationship between language and thought. More recently he has been vying for respect among people notoriously hard to persuade about anything--politicians and their financial backers. So this summer he has been on the road promoting his new book, "The Political Mind: Why You Can't Understand 21st-Century American Politics With an 18th-Century Brain" (Viking), which argues that liberals have clung to the false belief that people think in a conscious, logical, and unemotional manner and that this belief has doomed Democrats' chances with voters. Transferring scholarly ideas into political practice can be tricky. After a heady few years when he seemed "the" person Democratic policy makers wanted on the other end of the telephone, Lakoff is finding that what they're asking for--and are willing to put money behind--is not always what he can provide. Lakoff's foray into politics is a story marked by intellectual breakthroughs, the allure of influence, and a fall from great heights. Yet his lifetime work permeates several disciplines and continues to spur cognitive researchers to go off in new directions.