President Barack Obama served as the 44th President of the United States from 2009 to 2017. He was the first African American to hold this office. Before his presidency, he was a U.S. Senator from Illinois and a community organizer. Obama is known for his focus on healthcare reform, economic recovery, and foreign policy initiatives. During his time in office, Obama signed the Affordable Care Act, which aimed to expand healthcare coverage for millions of Americans. He also emphasized the importance of climate change and signed the Paris Agreement to address global warming. His presidency is often noted for its efforts to promote inclusivity and social justice.