Barack Obama was the 44th President of the United States, serving two terms from 2009 to 2017. He is the first African American to hold the office. Obama's presidency was marked by significant legislative achievements, including the Affordable Care Act (ACA), which expanded healthcare coverage to millions of Americans, and the Dodd-Frank Wall Street Reform and Consumer Protection Act, which aimed to regulate the financial industry and prevent future economic crises. He also ended the war in Iraq and increased support for renewable energy. Obama's leadership during the global financial crisis and his efforts to address climate change have been widely praised. Despite facing opposition from Congress, he was able to pass several landmark pieces of legislation, cementing his legacy as a progressive leader.