Arkady
President
Actually I took a few minutes to find a verifiable source and couldn't and so maybe it didn't?
I assume it didn't, because it sound strangely similar to an actual exchange during the second debate:
http://www.freerepublic.com/focus/news/1253974/posts
After Keyes had spent a while wallowing in a religious attack on granting same-sex couples equal rights under the law, Obama responded:
"I don't need Mr. Keyes lecturing me about Christianity. That's why I have a pastor. That's why I have my Bible. That's why I have my own prayer. And I don't think that any of you are particularly interested in having Mr. Keyes lecture you about your faith. What you're interested in is solving problems like jobs, and health care, and education. I'm not running to be the minister of Illinois. I'm running to be its United States Senator."
Please remember though, I mentioned it to show what was making the rounds back then that may have caused Democrats to start making proposals to change the wording of Article 2 Section 1.
Given the timing, it seems extremely far-fetched to me. You don't try to change the US Constitution to accommodate the off chance that some state senator might grow up to be president one day.