CREATE TABLE table_34796 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB)

when first elected was 1900 what was the district?
SELECT "District" FROM table_34796 WHERE "First elected" = '1900'
SELECT "District" FROM "table_34796" WHERE "First elected" = '1900'