Seven

No change from Zogby.

Democrat Barack Obama's lead over Republican rival John McCain held steady at seven points as the race for the White House entered its final four days, according to a Reuters/C-SPAN/Zogby poll released on Friday.

Obama leads McCain by 50 percent to 43 percent among likely voters in the three-day national tracking poll, virtually unchanged from Thursday. The telephone poll has a margin of error of 2.9 percentage points.

"Essentially there is no difference in today's tracking," pollster John Zogby said. "Obama is holding firm and McCain is not making any gains."