CREATE TABLE table_24397 ("District" TEXT, "Vacator" TEXT, "Reason for change" TEXT, "Successor" TEXT, "Date successor seated" TEXT)

When nathaniel g. taylor (u) is the successor what is the vacator?
SELECT "Vacator" FROM table_24397 WHERE "Successor" = 'Nathaniel G. Taylor (U)'
SELECT "Vacator" FROM "table_24397" WHERE "Successor" = 'Nathaniel G. Taylor (U)'