Réponse :
Hello,
Problematic for a presentation on Barack Obama:
I think if you want to talk about his presidential election you should say: How has Obama changed the United States and its history?
Otherwise if you want to talk about his overall life: How all his exploits, his successes, we allowed to revolutionize his life and make him famous?
Explications :
Tell me if this helped you and if you have any questions.
