関連ワード:  which president served 4 terms    which president served 4 terms and why    which president served 4 terms instead of 2    which president served 4 terms instead of stopping at 2    which president served 4 terms in usa    which president serve 4 terms and had polio    which president served for terms    which president served 4 consecutive terms    which president has served 4 terms    which president only served 4 terms