She might have added that libertarians (think Milton Friedman) had clear influence on conservatives regarding a military draft, tax policy, and school choice, for starters. In terms of partisan politics, the only self-identified libertarian in the 2008 presidential election, Rep. Ron Paul (R-Texas), not only showed candidates how to use the web for organizing and fundraising, he almost singlehandedly put foreign policy on the table as a serious topic. Virtually all the GOP and Dem candidates (even Obama early on) were essentially status quo when it came to examining Iraq and Afghanistan. That's a pretty freaking huge impact.