No, his parents were never married. Which I believe is a first for America.
Barak Hussein Obama...The Bastard President
If they were never married...then why did they get divorced?
His biological parents were married all right.
Just not to each other.
Dates?
We have seen images of the Stanley Ann Dunham - Barack Obama (Sr.) Hawaii court divorce case file here before, so there was a legal - unconcontested - divorce granted to SAD. (Judging by the numbering of the documents, there was at least one document missing from the file, which some speculated to have been BHO II's BC.)
When I first saw that, I was under the impression that one has to assert that there was a past legal marriage as a requirement to filing a divorce case. But a few folks here said that was not necessarily true. Still seems odd to me that there could be a divorce without a previous marriage.
As to the purported campaign flyer shown in the first post of this thread, it's obvious that some facts there are inconsistent with Obama's "Dreams from My Father." Obviously both cannot be true with respect to, e.g., Obama's mother's marital status at his birth and the state where Obama was raised. When it comes to Zero's past, there are few verifiable facts. There are still important mysteries to be definitely solved.