CREATE TABLE table_18120 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Results" CLOB, "Candidates" CLOB)

who are the candidates when the incumbent is lindsey graham?
SELECT "Candidates" FROM table_18120 WHERE "Incumbent" = 'Lindsey Graham'
SELECT "Candidates" FROM "table_18120" WHERE "Incumbent" = 'Lindsey Graham'