Because he (Obama) had such a global impact on people, all over the world, young, old, no matter what country they were from because he is A-MAZ-ING. Why is it even a question of why she threw herself into the campaign? She's young, hip, she wants to be a part of something life-changing and cool. Why not?(this thing i could never understand - assuming she is still british, how could she throw herself into a political campaign and democratic election of another country? )