On October 3, Public Policy Polling released a poll for the U.S. Senate race in Missouri. The results: Democratic incumbent Claire McCasill 46%, Republican Todd Akin 40%, Libertarian Jonathan Dine 9%, undecided 5%.
In the entire history of U.S. Senate elections in Missouri, no candidate other than the Democratic or Republican nominee has ever polled as much as 5%. Missouri, and the nation, have been holding popular general elections for U.S. Senate starting in 1914. Thanks to PoliticalWire for the link.