Table: successorships_3
Columns: district
vacator
reason_for_change
successor
date_successor_seated

Question: Which district did Ralph Harvey (r) vacated when he resigned?
SQL: SELECT "district" FROM successorships_3 WHERE "vacator" = 'Ralph Harvey (R)'

Question: Who did Walter B. Jones, Sr. (d) succeeded in office?
SQL: SELECT "vacator" FROM successorships_3 WHERE "successor" = 'Walter B. Jones, Sr. (D)'