John McCain has widened his lead over Barack Obama in the latest Gallup poll, and he remains in a statistical tie with Hillary Clinton.

In the hypothetical match-up, McCain leads Obama by six percentage points (48%-42%) and leads Hillary Rodham Clinton by only one (46%-45%).

Gallup writes: "Although both Clinton and Obama have lost ground to McCain over the past week, the current results may be particularly troubling for Obama in trying to combat Clinton's assertion to superdelegates that she would be the more electable of the two candidates in November."

For the first time in a while, Clinton also recently regained the lead over Barack Obama in the Gallup poll. Friday was the ninth consecutive day that Hillary lead Obama.