Actually, it would appear that Mr. Obama has no concern for these relatives. If the media has been able to 'dig them up' in such a short time, why not Mr. Obama? His concern for those less fortunate would appear to be only a rhetorical gimmick to garner votes.
Maybe he'd like these other relatives to stay hidden since they're not 'typical'?
Do not argue with an idiot. He will drag you down to his level and beat you with experience.