By the numbers:
Presidential and vice presidential debates, per CNN’s Amy Roberts61
: Percent of households that watched the third debate between John F. Kennedy and Richard Nixon on October 13, 1960.12
: Times Jim Lehrer from PBS has served as the moderator, including 2012.4:
Debates with more than two debaters. When Ross Perot ran as a third-party Independent candidate in 1992, he and running mate James Stockdale participated in the debates with Bill Clinton and George H. W. Bush, and Al Gore and Dan Quayle.
For more debate numbers: www.cnn.com