Third-party candidates could impact close races in swing states . The GOP is also facing a challenge from the left on issues such as immigration and gun control. Conservative Virgil Goode could siphon votes from Mitt Romney in Virginia . `` If the race is close enough , 100 votes can matter , '' said Scott Rasmussen , president of the polling company Rasmussen Reports . Libertarian Gary Johnson 's campaign says it attracts Republicans and Democrats .
Third-party candidates could impact close races in swing states . The GOP is also facing a challenge from the left on issues such as immigration and gun control. Conservative Virgil Goode could siphon votes from Mitt Romney in Virginia . Libertarian Gary Johnson 's campaign says it attracts Republicans and Democrats .