Mitt Romney has won the Republican presidential caucuses in Hawaii, salvaging a much needed victory after resurgent rival Rick Santorum won primaries in Alabama and Mississippi on Tuesday.

Romney finished a disappointing third behind Santorum and former House Speaker Newt Gingrich in the Deep South primaries. But he came back to edge out both rivals in Hawaii and added a sweep of delegates from Republican nominating caucuses in American Samoa.

Texas Rep. Ron Paul finished fourth in both Southern primaries, and third in the Hawaii caucuses.