By most accounts, the one sibling he is in regular contact with is his half-sister Maya (from his mother's side of the family), who lives in Hawaii. She attended both of his inaugurations and he visits her when he is in Hawaii on vacation. He has some half-siblings who are from his father's side and live in Kenya, but he does not seem to be as close to them. One half-brother (Malik) attended his wedding in 1992 and there are reports that they keep in touch sporadically.
There is no older son: the Obamas have two children-- both daughters.
Barack
Barack
African
Barack Obama is responsible for the people of the USA
Vladamir Mohammed Saddam Zhang Osama Ballakaffalatta idk
Joe Biden
barack obamas
Barack Obama Sr.
Hussein
lol no
Barack Obamas political office was in the white house