The FIRST Black President was not B Hussein Obama

HOW MANY BLACK PRESIDENTS ARE THERE
AND WHO WAS THE FIRST? BY BJ PAYNE

“Every child in America should be acquainted with his own country. He should read books that furnish him with ideas that will be useful to him in life and practice. As soon as he opens his lips, he should rehearse the history of his own country“.
Noah Webster, On the Education of Youth in America, 1788

Research shows at least five U.S. presidents had black ancestors and “Thomas Jefferson, the nation's third president, was considered the first black president“, according to historian Leroy Vaughn, author of Black People and Their Place in World History.

Who were they?

Thomas Jefferson: Our third President and served two terms between 1801 and 1809,
He was described as the "son of a half-breed Indian squaw and a Virginia mulatto father."

Andrew Jackson: Our seventh president, between 1829 and 1837. As reported by Vaughn, who cites an article written in The Virginia Magazine of History that “President Andrew Jackson was the son of an Irish woman who married a black man“. The magazine also stated that Jackson's oldest brother “had been sold as a slave“.

Abe Lincoln: 16th president, served between 1861 and 1865. Lincoln was said to have been the illegitimate son of an African man and his mother allegedly came from an Ethiopian tribe. Lincoln was nicknamed "Abraham Africanus the First" by his opponents because of the extreme controversy regarding his ancestry.

Warren Harding: the 29th president, between 1921 and 1923, apparently never denied his ancestry. Harding had black ancestors between both sets of parents. Harding had attended Iberia College, a school founded to educate fugitive slaves.

Calvin Coolidge: 30th president, served between 1923 and 1929. It was reported that he was proud of his heritage. He claimed his mother was dark because of mixed Indian ancestry. Coolidge's mother's maiden name was "Moor" and in Europe the name "Moor" was given to all blacks. It later was later learned Coolidge was indeed “part black.”

President Obama, 44th President, elected Nov. 2008. He being very open about his ancestry and because of the strong resemblance to his Kenyan father, most people acknowledge him as a black man, which is why people identify Obama as the first black president of the United States.
In conclusion:
President Barrack Hussein Obama is the 5th US President in US History