美利坚合众国第44任总统，贝拉克·奥巴马(Barack Obama)。贝拉克·奥巴马全名为贝拉克·侯赛因·奥巴马(Barack Hussein Obama),中学毕业后，他进入加利福尼亚州西方文理学院学习，2年后转入哥伦比亚大学学习，1983年毕业，获国际关系专业学士学位。1985年，他来到芝加哥，从事社区工作。1988年，他进入哈佛大学法学院学习。1991年在获得哈佛大学法学博士学位后，他曾在芝加哥一家律师事务所工作，后在芝加哥大学法学院教授宪法。
2008年8月27日，他在民主党全国代表大会上获得总统候选人提名。11月4日，他在美国总统大选中获胜，当选美国第56届(第44任)总统，并成为美国历史上首位非洲裔总统。2009年1月20日，奥巴马正式宣誓就职。2012年11月，奥巴马连任美国第57届总统，2013年1月20日宣誓就职,正式开始第二任期。
Barack Obama is the 44th and current President of the United States, in office since 2009. He is the first African American to hold the office. Born in Honolulu, Hawaii, Obama is a graduate of Columbia University and Harvard Law School, where he was president of the Harvard Law Review. He was a community organizer in Chicago before earning his law degree. He worked as a civil rights attorney in Chicago and taught constitutional law at the University of Chicago Law School from 1992 to 2004. He served three terms representing the 13th District in the Illinois Senate from 1997 to 2004, running unsuccessfully for the United States House of Representatives in 2000.
In 2004, Obama received national attention during his campaign to represent Illinois in the United States Senate with his victory in the March Democratic Party primary, his keynote address at the Democratic National Convention in July, and his election to the Senate in November. He began his presidential campaign in 2007, and in 2008, after a close primary campaign against Hillary Rodham Clinton, he won sufficient delegates in the Democratic Party primaries to receive the presidential nomination. He then defeated Republican nominee John McCain in the general election, and was inaugurated as president on January 20, 2009.
Nine months later, Obama was named the 2009 Nobel Peace Prize laureate. He was re-elected president in November 2012, defeating Republican nominee Mitt Romney, and was sworn in for a second term on January 20, 2013.