There have been 10 separate Republican candidates who have led in at least one national poll at some point in this nomination cycle (counting a few candidates who decided not to run officially). They are, in alphabetical order: Michele Bachmann, Herman Cain, Chris Christie, Newt Gingrich, Rudy Giuliani, Mike Huckabee, Sarah Palin, Rick Perry, Mitt Romney and Donald Trump. They may soon be joined by an 11th candidate, Rick Santorum, who is likely to lead in a new Public Policy Polling survey that will be out soon.
