Israel allows no dual citizens in its government. Why does America?
December 8, 2008
16. If the speaker of the Knesset has called upon its members to make their declarations of allegiance and a member has not done so, that member shall not enjoy the rights of membership as long as he has not made the declaration.
Non-declaration due to dual-citizenship (Amendment 22)
If a Knesset member holds an additional, non-Israeli citizenship, and the laws of the country whose citizenship he holds permit him to be released from such citizenship, he shall not declare allegiance until after he has done everything required on his part to be released from such citizenship, and he shall not enjoy the rights of a Knesset member until he makes his declaration.