[link to www.bostonglobe.com]

The White House never moved to correct the record, until the president’s famously private uncle took the witness stand in Boston immigration court two days ago.

Onyango Obama, now a 69-year-old liquor store manager in Framingham, said he had helped numerous students and had relatives in the United States, including his nephew, Barack Obama.

He said the president had stayed with him at his Cambridge apartment for three weeks when he came to attend Harvard Law School in the 1980s.
more at link.

My opinion, O found his Uncle to be not useful, so he conveniently forget about him. And any facts surrounding him. Bet the Uncle could have a few things to say about Barak's birth...place of birth, circumstances. etc.