If he and the children's mother have diplomatic immunity, his kids would not be US citizens. Not everybody who works at the UN has diplomatic immunity.
Originally Posted by sreeleshk
It gets more fuzzy if just one parent has immunity and the other doesn't.
EB3 ROW I-485 Approved: July 2007
USC: July 2013
I am a layman, not a lawyer. What I write here is not official or professional legal advice. In addition, my answers on this forum are specific to the scenarios discussed in each thread and should not be generalized to other situations.