I thought his grandfather was a furniture salesman.
His grandfather was a furniture salesman, and, his grandmother was a VP at a bank - from Wikipedia:
Madelyn and Stanley then moved to Hawaii, where he found a better furniture store opportunity. She started working at the Bank of Hawaii in 1960 and was promoted to be one of the first female bank vice presidents in 1970.[3] In 1970s Honolulu, both women and the minority white population were routinely the target of discrimination.[4]
This is also from the same entry (don’t recall seeing this before - perhaps 0bama’s Kenyan grandfather had some influence on him w white people?):
Ann attended the University of Hawaii and while she was there she met Barack Obama, Sr. a graduate student from Kenya. Both Dunhams were upset when their daughter married Obama, particularly after receiving a long, angry letter from the graduate student’s father in Kenya who “didn’t want the Obama blood sullied by a white woman.”[8] The Dunhams adapted, however. Madelyn Dunham was quoted as saying, “I am a little dubious of the things that people from foreign countries tell me.”[12]
http://en.wikipedia.org/wiki/Madelyn_and_Stanley_Dunham