From Pew, the Democratic nomination:
(of 407 Democrats)
Hillary Clinton 40%
Al Gore 18%
John Edwards 11%
John Kerry 11%
Joe Biden 6%
Bill Richardson 4%
Mark Warner 2%
Russ Feingold 2%
(of 409 Republicans)
Rudy Giuliani 24%
Condoleezza Rice 21%
John McCain 20%
Newt Gingrich 9%
George Allen 5%
Mitt Romney 4%
Bill Frist 3%
Sam Brownback 1%
General Election: (Time poll)
Two words -- NAME RECOGNITION. Same is true on both sides. People know Hillary Clinton and people know Rudolph Guiliani. I suspect that will change by Christmas 2006 or Valentines Day 2007.