CREATE TABLE table_750 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What district is tom j. murray from?
SELECT "District" FROM table_750 WHERE "Incumbent" = 'Tom J. Murray'
SELECT "District" FROM "table_750" WHERE "Incumbent" = 'Tom J. Murray'