Since people born in American Samoa aren't citizens, why not just remove it from the nation?
Samoa is a nation divided by colonialism, so it would on some level be historically just to create a united Samoa. But Samoans are not interested in it themselves - and America very rarely gives territory away. Decolonization seems not really to be on the American mental radar. Making them dependent on you and then gradually assimilating outlying territories (destroying most of their culture in the process) is more your game. The US being multiethnic makes the whole post-colonial issue trickier as everyone can
in principle be assimilated.
One question could be: Should the United States of America include territory outside of North America? (apart from already annexed Hawaii). It would be a logical place to draw a line.