Obama was born on August 4, 1961, at Kapiolani Medical Center for Women and Children in Honolulu, Hawaii.
Later in 1981, he transferred as a junior to Columbia University in New York City, where he majored in political science with a specialty in international relations and in English literature and lived off-campus on West 109th Street. He graduated with a BA degree in 1983.
Two years after graduating from Columbia, Obama was back in Chicago when he was hired as director of the Developing Communities Project, a church-based community organization originally comprising eight Catholic parishes in Roseland, West Pullman, and Riverdale on Chicago's South Side. He worked there as a community organizer from June 1985 to May 1988.
He then taught constitutional law at the University of Chicago Law School for twelve years, first as a lecturer from 1992 to 1996, and then as a senior lecturer from 1996 to 2004.
Obama and Michelle Robinson became engaged in 1991, and were married on October 3, 1992.
The United States Senate career of Barack Obama began on January 3, 2005. Obama won the seat in an election against Alan Keyes who replaced Republican Primary election winner Jack Ryan.
On February 10, 2007, Obama announced his candidacy for President of the United States in front of the Old State Capitol building in Springfield, Illinois.
On November 4, Obama won the presidency with 365 electoral votes to 173 received by McCain. Obama won 52.9% of the popular vote to McCain's 45.7%.
He resigned his seat in the U.S. Senate upon being elected President of the United States.
Obama as the 44th President took place on January 20, 2009.
On April 4, 2011, Obama announced his reelection campaign for 2012 in a video titled "It Begins with Us" that he posted on his website and filed election papers with the Federal Election Commission.
The operation took place on May 1, 2011, and resulted in the shooting death of bin Laden and the seizure of papers, computer drives and disks from the compound.
On October 21, 2011 President Obama announced that all U.S. troops would leave Iraq in time to be "home for the holidays".
On November 6, 2012, Obama won 332 electoral votes, exceeding the 270 required for him to be reelected as president. With 51.1% of the popular vote, Obama became the first Democratic president since Franklin D. Roosevelt to win the majority of the popular vote twice.
Second inauguration was on January 21, 2013.
Barack Obama's presidency ended at noon on January 20, 2017, immediately following the inauguration of his Republican successor, Donald Trump.