Barack Obama is a former President of the United States who served two terms from 2009 to 2017. He was the first African American to hold the office of President. Before becoming President, Obama worked as a community organizer in Chicago, served as a state senator in Illinois, and was elected to the U.S. Senate. During his presidency, Obama signed several significant bills into law, including an omnibus bill to stimulate the economy, legislation making health care more accessible and affordable, and legislation reforming the nation’s financial institutions. He also passed the first major ethics reform in 25 years, cut taxes for working families, and expanded health care for children and their parents. Some of the key events during his presidency include the implementation of the Affordable Care Act, the signing of the Dodd-Frank Wall Street Reform and Consumer Protection Act, and the lifting of a 22-year-old ban that restricted those with HIV/AIDS from entering the United States. Obama was awarded the Nobel Peace Prize for his efforts to strengthen international diplomacy and cooperation between peoples.