Huckabee, McCain in South Carolina dead heat

By John Whitesides, Political Correspondent

COLUMBIA, South Carolina (Reuters) - Republicans John McCain and Mike Huckabee are in a statistical dead heat as voters head to the polls in South Carolina's presidential primary, according to a Reuters/C-SPAN/Zogby poll released on Saturday.

Huckabee, a former Arkansas governor, shaved six points off McCain's lead in the tracking poll to trail the Arizona senator by just one point, 27 percent to 26 percent, as voting began -- well within the 3.4 percent margin of error.

In Nevada, which also holds a presidential nominating contest on Saturday, Democrat Hillary Clinton maintained a stable 6-point lead over rival Barack Obama, 45 percent to 39 percent, with John Edwards well back at 6 percent.

In both states, large pools of undecided or persuadable voters make the outcomes unpredictable. The uncertainty is compounded in Nevada, a relative newcomer to early nominating contests, because it has no real track record on turnout.

"It's a very close race in Nevada -- it's all about turnout," said pollster John Zogby. "It's probably Clinton's to lose, but how engaged will people be to come out and vote?"

Huckabee, a Baptist minister whose January 3 win in Iowa was fueled by support from evangelicals, has pulled even with McCain in South Carolina by gaining ground among Republicans and conservatives.

McCain still holds healthy leads among independents and Democrats, who do not hold their primary in South Carolina until next Saturday.

"It was a good day for Huckabee, he caught McCain among Republicans," Zogby said. "The key for McCain is going to be how many Democrats turn out for him here."