[Nero Germanicus]

Sure, why not? If the historical genealogical record backs it up, I have no problem with the lines of descent.
If only one genealogist had posited the family tree, I would be more skeptical but several professional genealogists have traced the same family lineage.

“Barack Obama’s Irish Family Tree Traced Back to the 17th Century, Shedding Light on Earliest Known Relatives

Eneclann researchers from Trinity College Dublin and Irish Origins have traced Obama’s family history much further back than ever before. Obama’s earliest known relative, his 6th great grandfather, was a member of a family of wealthy wig makers who included an Irish politician, Michael Kearney. It was said that ‘no man alive was equally fired with ambition’. “
http://www.origins.net/help/resarticle-obama.aspx

[Fred Nerks]

Problem is, he's not related to a Dunham, and he's not an Obama either, so all that Irish story is a load of leprechauns and shamrocks.

[Brown Deer]

Sure, why not? If the historical genealogical record backs it up, I have no problem with the lines of descent.

and how did all these genealogists get his DNA?

Eneclann researchers from Trinity College Dublin and Irish Origins have traced Obama’s family history much further back than ever before.

Old news. American researchers had this information several years ago.

Now it's up to you to prove to us, that your president is actually a descendant!

[Brown Deer]

If the historical genealogical record backs it up...

That's a mighty big if, since your president has sealed all of his records.

keep drinking fool

[Brown Deer]

...several professional genealogists have traced the same family lineage...

Who are the several professional genealogists who did this?