1) FOA chief 2) Eisenhower confidant 3) Frequent campaigner Harold 4) Frequent runner Harold 5) German surname 6) Harold of politics 7) Harold the candidate 8) He ran and ran and ran 9) He ran often 10) Noted Minnesota politico 11) Old GOP politico Harold 12) One of the candidates 13) Patronymic surname Found on https://www.crosswordclues.com/clue/stassen