[morphing libertarian]

not a citizen at birth. Born in Samoa are you readings the information

People born in Samoa are US Nationals not US citizens

[Okeydoker]

A child born to a US Citizen anywhere in the world is a US citizen.

[Verginius Rufus]

The child of a US citizen is a US citizen even if born outside the US. If Tulsi's mother was born in Indiana as is reported, then she was a citizen at birth despite being born in American Samoa.

It's all academic since she will never become President or Vice President.