Quite correct, if you mean biological father. But then without genetic testing we don't know who anyone's biodad is. Not Obama's, not McCain's, not Sarah Palin's, not mine, not yours.
Legal father is quite another kettle of fish. AFAIK, Obama's mom was married to Obama Sr. at the time of his birth. This makes Senior the father as far as the law is concerned. Biological facts are quite irrelevant.
By what documentation do you KNOW barry bassturd’s father was married to his mother when he was born? There is a divorce decree, but no marriage cert. A divorce decree comes at a popint in time much later than barry’s birth, so you can’t say for sure that barry had a father married to his mother when he was born.