ribit,
re: "decomposed ...obamba's mama was a citizen, so that makes him a citizen."
Not true.
From Snopes' discussion of this matter:
If only one parent was a U.S. citizen at the time of your birth, that parent must have resided in the United States for at least ten years, at least five of which had to be after the age of 16." Barack Obama's father was not a U.S. citizen and Obama's mother was only 18 when Obama was born, which means though she had been a U.S. citizen for 10 years, (or citizen perhaps because of Hawaii being a territory) the mother fails the test for being so for at least 5 years **prior to** Barack Obama's birth, but *after* age 16.
Snopes goes on to support Obummer's legitimate citizenship - but on the basis that he was born in the U.S., not on the grounds that his mother's citizenship grants it to him as well.
So, you're incorrect.