For your study:

https://www.narratives-management.de/grosse-storyteller-barak-obama/

https://www.tandfonline.com/doi/full/10.1080/23311983.2024.2433828#abstract

https://link.springer.com/chapter/10.1007/978-981-10-2161-9_3

The 2009 Nobel Peace Prize was awarded to United States president Barack Obama (b. 1961) for his
"extraordinary efforts to strengthen international diplomacy and cooperation between peoples".

https://en.wikipedia.org/wiki/2009_Nobel_Peace_Prize