The gap between Barack Obama and Hillary Clinton in North Carolina remains the same in the latest tracking poll by Zogby International.

Zogby surveyed 600 likely Democratic primary election voters on May 2-3, and found that Obama was the choice of 48 percent. Clinton was the choice of 39 percent, while 8 percent remained undecided. The margin of error was plus or minus 4.1 percentage points.

That's the same gap between Zogby's poll released Saturday.

A new tracking poll by Zogby shows the presidential race continuing to tighten in North Carolina.

Zogby surveyed 627 likely Democratic primary voters May 1-2, and found that Barack Obama was the choice of 46 percent. Hillary Clinton was the choice of 37 percent. 9 percent were not sure.

The margin of error was plus or minus 4.0 percentage points.

The same poll found that 19 percent of likely Democratic primary voters would defect to Republican John McCain in the general election if Obama is the Democratic nominee. If Clinton is the nominee, 17 percent said they would support McCain.