pop-culture (Mass Media) in its role in implementing the contemporary foreign policies
These terms are very broad. You will have to find specific examples of connections between specific media and specific policy decisions. If this was my project, I would try to focus on a particular kind of media and a particular area of foreign policy. That is how to make it really intense and meaningful.
best implemented with the... ---"best" is very vague. This statement sounds really vague. Also, it is wordy and unnecessary to talk about the Bush and Obama administrations. Why not just say, "21st century" because that is really what you are covering.
Take out as many words as possible, and narrow the focus as much as possible.
:-)