I will, as soon as you admit you don’t know where it is. I asked you the question first.
On 2nd thought, I realize you’re never going to admit you don’t know, so I will tell you.
It’s in Amendment 20, Section 3.
http://www.usconstitution.net/xconst_Am20.html
The answer is: It’s the responsibility of the President-elect to prove his/her qualifications. So, it really is Obama who needed to prove that he is qualified to be president. Not “the party doing the nominating” of him.