The 2012 PGA golf championship showcased the green links, yellow sands and blue skies at the beachside Kiawah country club in South Carolina. But it also exposed the political maneuvering that annually brings about 170 low-wage black workers from Jamaica into South Carolina for temporary jobs that could otherwise have gone to local South Carolina workers. Those low-wage workers helped the club’s financial returns, and indirectly, also helped South Carolina’s Sen. Lindsey Graham, who has long pushed for an immigration rewrite that would import more low-wage foreign workers. In February, Graham told a Rotary Club lunch in Easley, S.C., that...