Exactly. Obama’s father had been married before and apparently did not tell his mother about it when they were married.
So, what was it? Under American law, such a marriage could easily be annulled—or under traditional Catholic law, for instance. It was a marriage under false pretences.
Obama seems to treat it as a Muslim marriage, with his mother as the second wife. But was there ever a proper Muslim marriage? And if so, was it legal under American law? Even Muslims are expected to inform second wives about the existence of their first wives.
Perhaps it would not matter if Obama were simply illegitimate, if there were not also questions about his citizenship.
And also, frankly, some basic questions about his good judgment. Why does he prefer and idolize a drunken, corrupt, philandering, wife-abandoning, child-abandoning father over his mother—and over the grandparents who loved him, paid for his schooling, and brought him up—apparently for no other reason than that his father represented two things he admired over everything else: He was Muslim and black.
I think you have an excellent point about whether or not Obama's parents were considered married according to American law IF he was born in Kenya or anywhere other than the US. I could care less about illegitimacy in this day and age; that's not his fault. But we do have laws about eligibility for becoming president. In this day and age when the world seems to want to tear down our national boundary, it's critical that we abide by the letter of the law.