In 2007, long-shot Democratic candidate Mike Gravel released one of the strangest ads in political history.

Perhaps the most famous political ad of all time, this early television spot ran on air just once, but generated enough media coverage to become a real factor in the 1964 presidential election.

In 1831, a radical third party had a new idea for selecting a presidential candidate, and it’s still in use today: the national nominating convention.

In the 2012 Republican primary, Herman Cain's campaign produced an unusual video featuring Cain's chief of staff, Mark Block, giving a pep talk while smoking a cigarette.