How many US presidents have won the Nobel Peace Prize while in office?

Related questions

1. Why did Barack Obama win a Grammy?
2. What is a twitter locked account?
3. How many children does George and Barbara Bush have?
4. Why did Twitter suspend my account?
5. Who lost the most Twitter followers?
6. When was Obama reelected?
7. What are the 6 Nobel Prize categories?
8. Did Bill Clinton win the popular vote in 1996?
9. Who is the most followed person on Snapchat?
10. What is Malia Obama's net worth?

Tags

1. #roosevelt
2. #heads
3. #jimmy
4. #peace
5. #president
6. #theodore
7. #wilson
8. #barack
9. #awarded
10. #presidents
11. #government
12. #prize
13. #nobel
14. #state
15. #carter
16. #woodrow
17. #obama
18. #award