CREATE TABLE table_28911 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

Who is every incumbent when Kentucky 2 is the district?
SELECT "Incumbent" FROM table_28911 WHERE "District" = 'Kentucky 2'
SELECT "Incumbent" FROM "table_28911" WHERE "District" = 'Kentucky 2'