Reply #236: I'll take the last part

[jberryhill]

People tremendously misunderstand notions of "dual citizenship".

As far as US law is concerned, one is a US citizen or not. US law doesn't care whom else might recognize you as a citizen.

Under the conditions of Kenyan independence and its separation from Britain, Mr. Obama would have needed to make a further confirmation to the UK of his intent upon reaching 18. He did not.

However, it would not have mattered at all relative to his US status, just as it does not matter than many natural born US citizens have perfected Irish citizenship through lineage, and Israeli citizenship, to cite two common examples of citizenships obtained by US citizens in addition to their US one.