Why? Read Article II, Section 1, Clause 5 and tell me how this would make him ineligible.
Obama is not only unfit for the office of POTUS, but is - apparently - ineligible, too!
I'll grant you the unfit part. But trying to prove the ineligible is a waste of time.
Except for the age of his mother at the time and if his grandmother is correct that she witnessed his birth in Kenya would.
How did he get the other citizenship? Parentage or birth location? if the latter, then he is ineligible.
Problem is, nobody can prove where he was actually born.
Amendment XIV
Section 1. All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the state wherein they reside...
Article 2 specifically addresses that to be eligible for PoTUS, you must be at least 35 years old, resided in this country for at least 14 years, and be a "natural born citizen" (or a citizen at the time of adoption of the Constitution, which no one alive today could claim).
The 14th Amendment only refers to requirements to be a citizen, and the protections and rights such citizenship offers.
Dual citizenship is not recognized by Article 2, Section 1, only one who is a "natural born citizen", providing all other conditions are equally met, is eligible to run for and/or hold the office of PoTUS.
If he is not ineligible, why then does he not just present his birth certificate?