Who is the current President of the United States?

The current President of the United States is Joe Biden, who took office on January 20, 2021. Biden is a member of the Democratic Party and previously served as Vice President under Barack Obama from 2009 to 2017. His administration has focused on various initiatives, including economic recovery, healthcare reform, and addressing climate change.

In the context of the other options, Donald Trump served as President before Biden from 2017 to 2021, and Barack Obama was President from 2009 to 2017. George W. Bush held the office from 2001 to 2009. Understanding the timeline of these presidencies is crucial for recognizing the correct answer.