Barack Obama was the last president of the US to serve before the current president, Donald Trump, who has was elected in the 2016 election. Due to his "recentness" as being president, people may remember more details about Obama, but sadly his high IQ score got overshadowed by other scandals, such as the "birther" conspiracies that plagued the early parts of his presidency.
He served as the 44th President of the United States, for a total of two terms, which means he was in office from 2009 to 2017. Apart from that, he is famous for being the first African American to assume the presidency, which was a major feat for him and the country. Before he became president, he served as a senator in Illinois from 2005 to 2008.