Name three American presidents in the 21st century.
Three American Presidents in the 21st century are: 

1. George W. Bush (2001-2009)
2. Barack Obama (2009-2017)
3. Donald Trump (2017-2021)
Complete the following task based on the instruction and optional input provided.### Instruction:
Name three American presidents in the 21st century.

### Output:
Three American Presidents in the 21st century are: 

1. George W. Bush (2001-2009)
2. Barack Obama (2009-2017)
3. Donald Trump (2017-2021)