teenth ▁Am end ment ▁prohib its ▁any ▁person ▁who ▁sw ore ▁an ▁o ath ▁to ▁support ▁the ▁Constitution , ▁and ▁later ▁re bel led ▁against ▁the ▁United ▁States , ▁from ▁becoming ▁president . ▁However , ▁this ▁dis qual ification ▁can ▁be ▁lifted ▁by ▁a ▁two - third s ▁vote ▁of ▁each ▁house ▁of ▁Congress . ▁ ▁The ▁Tw enty - second ▁Am end ment ▁prohib its ▁anyone ▁from ▁being ▁elected ▁to ▁the ▁presiden cy ▁more ▁than ▁twice ▁( or ▁once , ▁if ▁the ▁person ▁serves ▁as ▁president ▁or ▁acting ▁president ▁for ▁more ▁than ▁two ▁years ▁of ▁a ▁president ial ▁term ▁to ▁which ▁someone ▁else ▁was ▁originally ▁elected ). ▁ ▁Regarding ▁succession ▁Article ▁II , ▁Section ▁ 1 , ▁Cla use ▁ 6 ▁makes ▁the ▁vice ▁president ▁first ▁in ▁the ▁line ▁of ▁succession . ▁It ▁also ▁emp ow ers ▁Congress ▁to ▁provide ▁by ▁law ▁who ▁would ▁act ▁as ▁president ▁in ▁the ▁case ▁where ▁neither ▁the ▁president ▁nor ▁the ▁vice ▁president ▁were ▁able ▁to ▁serve . ▁ ▁Two ▁constitution al ▁am end ments ▁elaborate ▁on ▁the ▁subject ▁of ▁president ial ▁succession ▁and ▁fill ▁g aps ▁exposed ▁over ▁time ▁in ▁the ▁original ▁provision : ▁ ▁Section ▁ 3 ▁of ▁the ▁Tw enti eth ▁Am end ment ▁decl ares ▁that ▁if ▁the ▁president - elect ▁dies ▁before ▁his ▁term ▁begins , ▁the ▁vice ▁president - elect ▁becomes ▁president ▁on ▁In aug uration ▁Day ▁and ▁serves ▁for ▁the ▁full ▁term ▁to ▁which ▁the ▁president - elect ▁was ▁elected , ▁and ▁also ▁that , ▁if ▁on ▁In aug uration