He never has legally changed his first name, nor did he need to do so. Many people use a nickname-- Joseph becomes Joe, Lawrence becomes Larry, Barack becomes Barry. But at some point in college, President Obama decided to embrace his birth name and returned to using "Barack" rather than Barry.
Yes Barack Obama can legally be 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.
Our current president's name is legally Barack Hussein Obama II. Before he immigrated and changed it, his name was Barry Soetoro.
Barack Obama. (The President is Barack Obama II.)
Donald J. Trump became the President after Barack Obama.
barack obama
No, Barack Obama is the President of the United States of America.
Barack Obama