CREATE TABLE "table1_1651764_3" (
  "district" text,
  "vacator" text,
  "reason_for_change" text,
  "successor" text,
  "date_successor_seated" text
);

Question: who is the vacator whre the district is new jersey 2nd?
SQL: SELECT "vacator" FROM "table1_1651764_3" WHERE "district"='New Jersey 2nd';