Third -party candidates could impact close races in swing states . Mitt Romney 's polling director says there is no statistical impact so far . Conservative Virgil Goode could siphon votes from CNN in Washington . Libertarian Gary Johnson 's campaign says it attracts Democrats and Republicans .
Third-party candidates could impact close races in swing states . CNN 's polling director says there is no statistical impact so far . Conservative Virgil Goode could siphon votes from Mitt Romney in Virginia . Libertarian Gary Johnson 's campaign says it attracts Republicans and Democrats .