Mitt Romney has regained the top spot from Newt Gingrich in Gallup’s national daily tracking poll.

It’s the fourth lead change between the two candidates since Gallup began tracking the GOP contest in November.

In the five-day rolling average from Jan. 27 to Jan. 31, Romney now leads the field at 31 percent, followed by Gingrich at 26 percent, former Sen. Rick Santorum (Pa.) at 16 percent, and Texas Rep. Ron Paul at 11 percent.

Romney had fallen behind Gingrich in the poll after the former House Speaker’s convincing victory in the Jan. 21 South Carolina primary.

However, last week Romney logged a series of strong debate performances, which coupled with more than $15 million in advertising in the Sunshine State, led to a landslide victory in Tuesday’s primary.

That Gingrich seems to be maintaining his national standing in the Gallup poll is one bright spot for his campaign after a brutal week on the trail.

The next GOP presidential contest will take place in Nevada, which holds a caucus on Saturday, Feb. 4. Santorum won the only other caucus election this year when he nipped Romney in Iowa by 34 votes.

Romney won the Nevada caucuses in 2008 by 40 percent over Paul and eventual GOP nominee Sen. John McCainJohn Sidney McCainMcConnell: 'Whoever gets to 60 wins' on immigration Meghan McCain: Melania is 'my favorite Trump, by far' Kelly says Trump not likely to extend DACA deadline MORE (R-Ariz.).

In 2008, however, Romney was one of the few candidates to actively campaign in Nevada before the election. Paul and Santorum left Florida before Tuesday’s primary to focus on states in the West.