Who was the President of the United States before Donald Trump?

The President of the United States before Donald Trump was Barack Obama. Serving two terms from January 20, 2009, to January 20, 2017, Obama was the 44th president and the first African American to hold the office. His presidency is notable for several key legislative accomplishments, including the Affordable Care Act, which aimed to expand healthcare access, as well as efforts in foreign policy, such as the Iran nuclear deal and the pivot to Asia. This period also involved significant economic recovery initiatives following the 2008 financial crisis. Obama's administration laid the groundwork for a range of social and economic policies that influenced the political landscape leading up to Trump's presidency.