THE NUMBERS—DEMOCRATS

Hillary Rodham Clinton, 32 percent

Barack Obama, 18 percent

Al Gore, 14 percent

John Edwards, 12 percent

THE NUMBERS—REPUBLICANS

Rudy Giuliani, 27 percent

John McCain, 19 percent

Fred Thompson, 14 percent

Mitt Romney, 8 percent

OF INTEREST:

Clinton and Obama were also the Democratic front-runners in Quinnipiac's Feb. 21 poll, but support for both has slipped slightly, with Edwards and Gore gaining ground. Giuliani has dropped 13 points since February, but McCain has barely budged, helping Thompson. Giuliani does slightly better than McCain in matchups against the top two Democrats, while Obama is a bit stronger than Clinton against the two leading Republicans. People view each of those four favorably over unfavorably by roughly two-to-one margins or better, except for Clinton, over whom they are about evenly split.

The Quinnipiac University Polling Institute questioned 1,166 U.S. voters from April 25 to May 1. The poll has a sampling margin of error of plus or minus 3 percentage points. The sampling margin of error was plus or minus 4.5 percentage points for the 499 Democrats polled, as it was for the 469 Republicans surveyed.