(CNN) – Rick Santorum, who last week enjoyed a 10-point nationwide lead over Mitt Romney, is now within one point of his chief GOP rival after dropping several points in Gallup's daily tracking poll.
The survey taken February 22-24 showed Santorum with the backing of 31% of registered Republicans and Republican-leaning independents, down two points from Friday and down five points from his peak on Wednesday.
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Support for Romney rose to 30%, a much-needed boost for the candidate who stood at 25% on Wednesday.
For the ongoing poll, Gallup surveys more than 1,000 registered Republican voters on a daily basis. The poll drops the oldest of five days each day and adds results from the most recent day of polling.
In the latest survey, Gallup questioned 1,153 Republicans and Republican-leaning independents by telephone between February 20 and February 24. The survey has a sampling error of plus or minus three percentage points.
The results Saturday include two days of polling after CNN's Republican presidential debate in Arizona, the final time the four candidates squared off before key contests in Michigan and Arizona next week, as well as the votes in 10 states on Super Tuesday, March 6.
The two other candidates in the race, former House Speaker Newt Gingrich and Texas Rep. Ron Paul, were both well behind the two front-runners. Gingrich stood at 16% and Paul was at 11%. Neither Gingrich nor Paul has seen a change in his numbers since Thursday.