PPP: most accurate numbers in the country for South Carolina

Public Policy Polling is the only company in the country that correctly predicted Barack Obama would win by at least 20 points in today’s South Carolina primary.

Most outfits showed the race tightening in the closing days. PPP, however, showed Obama’s lead increasing from 13% two weeks ago to 16% earlier this week to 20% two nights before the election.

Here are what pollsters across the country predicted as the winning margin:

Public Policy Polling	20
Reuters/C-Span/Zogby	15
Rasmussen	15
Survey USA	13
Insider Advantage	10
Ron Lester&Associates	10
Mason Dixon	8
Clemson University	7
American Research Group	3

Public Policy Polling’s final survey showed Obama at 44%, Clinton at 24%, and Edwards at 19%. PPP surveyed 595 likely Democratic primary voters on January 24nd. The survey’s margin of error was +/- 4.0%.