Who became the first African American president of the United States?

Barack Obama became the first African American president of the United States, serving two terms from 2009 to 2017. His election was a historic moment in American history, representing a significant milestone in the nation's ongoing struggle for civil rights and racial equality. Obama's presidency symbolized hope and progress for many Americans, both as a leader and as a representation of the diverse fabric of the country. His administration focused on various progressive policies, including healthcare reform, climate action, and economic recovery following the Great Recession.

In contrast, the other individuals listed served as presidents but do not reflect the same groundbreaking significance in terms of racial representation. George W. Bush and Bill Clinton are both white men who served before Obama, while Donald Trump, also a white male, was elected after Obama. Thus, Barack Obama's election stands as a pivotal point in the narrative of American leadership and representation.