American Research Group:
Newt Gingrich leads the South Carolina Republican presidential primary with 40% and is followed by Mitt Romney with 26%, Ron Paul with 18%, and Rick Santorum with 13%.
Gingrich has gained 7 percentage points since the survey conducted January 17-18 and Romney has lost 6 percentage points since that survey.
Gingrich leads Romney 47% to 24% among self-identified Republicans, followed by Paul and Santorum with 14% each. Paul leads among independents and Democrats with 33%, followed by Romney with 31%, Gingrich with 18%, and Santorum with 10%.
Gingrich leads among those likely primary voters saying they are supporters of the Tea Party with 48%, followed by Romney with 19%, Santorum with 16%, and Paul with 14%. Gingrich leads with 33% among those saying they are not supporters of the Tea Party or are undecided about the Tea Party, followed by Romney with 31%, and Paul with 22%.
Gingrich leads Romney among men 38% to 25%, followed by Paul with 21%. Among women, Gingrich leads Romney 42% to 26%, followed by Paul with 16%, and Santorum with 13%.
Gingrich leads Romney 43% to 24% among likely Republican primary voters saying they will definitely vote.