CREATE TABLE table_3011 ("District" CLOB, "Vacator" CLOB, "Reason for change" CLOB, "Successor" CLOB, "Date successor seated" CLOB)

What district was the successor seated in March 28, 1878?
SELECT "District" FROM table_3011 WHERE "Date successor seated" = 'March 28, 1878'
SELECT "District" FROM "table_3011" WHERE "Date successor seated" = 'March 28, 1878'