I have not looked at the 1924 election, but there is a quote in the section on the Hoovercrats from V.O. Key’s
Southern Politics in State and Nation (page 321):
Like Alabama’s Chilton County, Sampson County’s “Solid South”-era white Republicanism dates from the Populist era.
Although unlike Chilton it was not won by Weaver in 1892, Sampson did switch to Republicanism (and Theodore Roosevelt in 1912) after Bryan’s Populism faded out with his second campaign in 1900. It was the centre of North Carolina’s Populist Party under Senator Marion Butler and Third District Congressman John E. Fowler, and when the Democrats passed the constitutional amendment disfranchising black voters in 1900, Sampson’s whites turned to the Republican Party until FDR – even then it was won by Willkie in 1940 and Dewey in 1944.