Gary Johnson Poses a Headache for Romney

All that tie talk is based on two-candidate polls; when Johnson is included ... whoops!

A new Zogby poll suggests that Libertarian Party nominee Gary Johnson could throw the presidential election to President Obama, with the anti-government candidate taking enough votes from Gov. Mitt Romney to give Obama a narrow edge.

In a survey of 798 likely voters conducted August 31 through September 3, Zogby found that if Johnson's name was not mentioned, Obama and Romney were basically tied, with Obama receiving 43.8 percent of the vote, Romney getting 43.5 percent, and 12.7 percent undecided.

But throw Johnson's name in and the numbers shift toward Obama is a way that could swing what is expected to be one of the closest elections ever.