The Contenders: 16 for '16TV Show

One of the toughest tasks in modern presidential campaigns is mounting a competitive third party bid that can siphon attention—and votes away—from the major party candidates. Texas billionaire Ross Perot’s unconventional campaign would excite and disrupt the 1992 election, while consumer advocate Ralph Nader’s success in 2000 would leave many liberals labeling him a “spoiler.”