Washington, DC (LifeNews.com) -- A new Zogby poll finds that Barack Obama now does better than either Hillary Clinton or John Edwards against the leading Republican presidential candidates. While Rudy Giuliani and John McCain would beat the other two, Obama is the only Democrat leading in head to head matchups.

Against Giuliani, the pro-abortion former New York mayor, Obama would win 48-42, the Zogby poll shows. he would best McCain, an Arizona senator who opposes abortion, by a closer 46-43 percent margin.

Obama would beat former Massachusetts Gov. Mitt Romney, who said he became pro-life a few years ago, and pro-life former Tennessee Sen. Fred Thompson both by a larger 52-35 margin.

On the other hand, Giuliani would beat Clinton, the pro-abortion New York senator 48-43 and beat Edwards, the pro-abortion former vice-presidential candidate, 47-43. McCain tops Edwards 46-41 and Clinton 47-43.

Clinton and Edwards only fare well against Romney and Thompson, with Clinton beating Romney 48-40 and Thompson 48-41 and Edwards winning 50-36 and 48-40 respectively.

Bill Richardson, the pro-abortion New Mexico governor, was also in the Zogby poll and he loses by lopsided margins to Giuliani and McCain, defeats Thompson by one and Romney by three points.

The new poll includes telephone interviews with likely voters and was conducted from May 17 to May 20, 2007. The margin of error is five percent.