Clinton's top Democratic rivals, Barack Obama and John Edwards, still lead Republicans in hypothetical match-ups ahead of the November 4, 2008, presidential election, the survey by Zogby Interactive showed.

Clinton, a New York senator who has been at the top of the Democratic pack in national polls in the 2008 race, trails Republican candidates Rudy Giuliani, Mitt Romney, Fred Thompson, John McCain and Mike Huckabee by three to five percentage points in the direct matches.

In July, Clinton narrowly led McCain, an Arizona senator, and held a five-point lead over former New York Mayor Giuliani, a six-point lead over former Tennessee Sen. Thompson and a 10-point lead over former ...