The presidents job is to deal with foreign affairs, and receive ambassadors. Obama has simply chosen to be involved more personally. He is good at public speaking, and is well liked world wide. Those qualities make him well suited to host a meeting in the U.N.So, would you hand your infant son over to an inexperienced Rabbi who, while not trained in anyway, wants to perform the office of a Mohel?
Somehow, if you did, I don't think you'd have to worry about the problem of grandchildren.