Hmmm. I'm not sure if that is a political comment I should leave alone or if you're asking a serious genealogy question. I'll just assume you're asking a genealogical question.
I am one of probably half of the Caucasian race of Americans who are descended from the approximately 20,000 Puritans - immigrants to New England from 1630-1650. Their descendants include a group of presidents which can be called "the New England" presidents.
I understand President Obama is in that group, but he was elected too recently to be in the AAP book that I have. This book presents six? (or more?) generations of ancestors in ahnentafel format for each president.
If one compares their own ahnentafel to a president's ahnentafel, one can often see if there is a possibility of having an immigrant ancestor in common. Since Obama is certainly more than six generations from most New England immigrants, tieing into his ahnentafel will be harder than earlier ones - as you have more generations to tie him back to an immigrant - or a nearest common ancestor.
In case you really want be bored about this subject, I have prepared a presidents' page for me and my cousins for the presidents that we are related to through my maternal grandparents. My cousins and I are cousins to 14 New England presidents through 37 immigrant New England ancestors.http://freepages.genealogy.rootsweb.ancestry.com/~riss/baldw...
This is one of those fun parts of my little genealogy hobby. And, yes, I realize that some links on these pages, which I put up about 10-15 years ago, are dead links. I'll have to update them (or remove them) one of these days. Some are still good, though.