Chances of getting into George Mason University

Hi,

What are my chances of getting into the MA in International Security Program at George Mason University if my average undergraduate GPA is 2.53? I hold a BA in Political Science and International Affairs from the Lebanese American University in Beirut.

My grades are the following:

Introduction to Political Science: B-
Macroeconomics: D ( I repeated this course and got a C+
Comparative Governments of the Major Powers: C+
Lebanese Politics and Administration: C+
Politics of the Developing Areas: C+
Foreign Policy of the Major Powers C+
Middle Eastern Governments and Politics: B-
Methodology and Political Analysis: C
Microeconomics: C
Public International Law: D (repeated course and got a B+)
Diplomatic and Consular Services: C+
American Government & Politics: B-
Public International Law: B+
Int’l and Regional Organizations and Agencies: B+
Concepts of World Politics: B+
Senior Study- Polisci: B
Middle Eastern International Affairs: B-
Economic Development: C+

Also, what are some other universities I should be looking at? Thanks in advance.

And how can I strengthen my application?