Washington (CNN) - Newt Gingrich holds a 15 point advantage over Mitt Romney in the race for the GOP presidential nomination, according to a new national survey of registered Republicans.
Thirty-seven percent questioned in Gallup's inaugural daily tracking poll this cycle say they are likely to support the former House speaker for the GOP nomination, with 22% backing the former Massachusetts governor, who's making his second bid for the White House.
Gallup's previous national survey, conducted in mid November, had Gingrich at 22% and Romney at 21%.
The new poll indicates that 8% support Rep. Ron Paul of Texas, who's making his third run for the presidency, with Texas Gov. Rick Perry at 7% and Rep. Michele Bachmann at 6%, former Sen. Rick Santorum of Pennsylvania at 3%, former Utah Gov. and former ambassador to China Jon Huntsman at 1% and 17% backing other candidates or unsure.
The survey's Tuesday release comes four weeks before Iowa's Jan. 3 caucuses, which kick off the presidential primary and caucus calendar.
According to the poll, Gingrich holds a 47%-17% advantage over Romney among self-described tea party movement supporters, with Romney holding a 28%-27% margin over Gingrich among non-tea party supporters.
The Gallup Daily Tracking Poll was conducted Dec. 1-5, with 1,277 Republicans and GOP leaning independents questioned by telephone. The survey's overall sampling error is plus or minus three percentage points.