dual national
Neither US nor Mexican law forbids dual citizens from voting in both nations.
He is a dual citizen of Jordan and the USA who has lived in Seattle for 20 years.
I have family that are dual citizens or that live in the US as Canadian citizens.
He was born and grew up in Edinburgh but he is a dual citizen - his father is a former US serviceman.

SMART Vocabulary: related words and phrases

Countries, nationalities & continents: country & nation
birthright citizenship
body politic
BRICS
citizen
compatriot
cross-border
cross-national
denaturalize
domestic
dual
fatherland
internationalism
native
non-country
non-domestic
non-indigenous
non-national
noncitizen
statehood
stateless