![Scott Morgan FILE - Libertarian presidential candidate Gary Johnson speaks during a campaign rally in Des Moines, Iowa, Sept. 3, 2016. 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/Scott Morgan, File)](https://mapi.associatedpress.com/v2/items/2b63bbe6367a47cc81186c3b87022e02/preview/preview.jpg?s=680x)
FILE - Libertarian presidential candidate Gary Johnson speaks during a campaign rally in Des Moines, Iowa, Sept. 3, 2016. 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/Scott Morgan, File)
![Ron Edmonds FILE - Independent candidate Ross Perot speaks as President George Bush, left, and Democratic candidate Bill Clinton listen during a debate in Richmond, Va., Oct. 15, 1992. 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/Ron Edmonds, File)](https://mapi.associatedpress.com/v2/items/c655e1db569642c68cc6ba88dbe07e27/preview/preview.jpg?s=680x)
FILE - Independent candidate Ross Perot speaks as President George Bush, left, and Democratic candidate Bill Clinton listen during a debate in Richmond, Va., Oct. 15, 1992. 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/Ron Edmonds, File)
![Uncredited 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)](https://mapi.associatedpress.com/v2/items/b5f532b779294e1cb532651615fe6435/preview/preview.jpg?s=680x)
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)
![Jose Luis Magana FILE - Independent presidential candidate Robert F. Kennedy Jr. speaks during the Libertarian National Convention at the Washington Hilton in Washington, May 24, 2024. 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/Jose Luis Magana, File)](https://mapi.associatedpress.com/v2/items/ddd729352226435c80e91876fb017524/preview/preview.jpg?s=680x)
FILE - Independent presidential candidate Robert F. Kennedy Jr. speaks during the Libertarian National Convention at the Washington Hilton in Washington, May 24, 2024. 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/Jose Luis Magana, File)