FILE - Republican presidential hopeful Ronald Reagan, from left, Independent candidate John Anderson and Howard Baker appear prior to the scheduled debate between Reagan and George Bush in Nashua, N.H., Feb. 24, 1980. An Associated Press analysis of Gallup data going back to 1980 shows that it's pretty common for third-party candidates to look like they have polling momentum in the months before an election, only to come up far short at the ballot box. (AP Photo, File)