12 countries

Mexico:                                                              

Federal republic                                                     

President Enrique Pena Nieto

Germany:

Federal Republic
Joachim Gauck

Syria:

republic under an authoritarian regime

President Bashar al-Assad



China:
Communist state
President Xi Jinping

United Kingdom:
Constitutional Monarchy and Commonwealth Realm
Prime Minister David Cameron

Canada:
A parliamentary Democracy, a federation, and a Constitutional Monarchy
Prime Minister Stephen Harper

India:
Federal Republic
President Pranab Mukherjee

France:
Republic

President Francois Hollande


Japan:
A parliamentary government with a constitutional monarchy
Prime Minister Shizno Abe

Russia:

Federation

President Vladimir Putin

Brazil:

Federal Republic

President Dilma Rouseff

Israel:

Parliamentary Democracy

President Benjamin Netanyahu