[PJBankard]

So Puerto Rico, a US Territory, isn’t US Soil. Yet anyone born there is a US citizen and can vote in the Presidential Elections.

[Cboldt]

People born in Puerto Rico are made US citizens solely by operation of a statute, 8 USC 1402. Similar with Guam, Virgin Islands, and Panama Canal Zone.

[Cboldt]

I would add that Puerto Rico has no representation on Congress, and no presence in the elctoral college. The political parties gives the territories say in primaries, but that’s a party function, not a government function.