CREATE TABLE table_76981 ("Poll source" CLOB, "Dates administered" CLOB, "Jim DeMint  ( R ) " CLOB, "Alvin Greene  ( D ) " CLOB, "Tom Clements  ( G ) " CLOB, "Other" CLOB, "Undecided" CLOB)

Which poll source had an other of 15%?
SELECT "Poll source" FROM table_76981 WHERE "Other" = '15%'
SELECT "Poll source" FROM "table_76981" WHERE "Other" = '15%'