Because he was elected as a president.
Barack Obama
Barack Obama was the president of the United States.
President Barack Obama.
President Barack Obama, is wherever the U.S. needs him to be.
Barack Obama is the president of the United States of America.
Barack Obama. (The President is Barack Obama II.)
Yes Barack Obama can legally be president.
Donald J. Trump became the President after Barack Obama.
barack obama
No, Barack Obama is the President of the United States of America.
President Barack Obama is the only US President to be born in Hawaii.
Barack Obama