Democratic
Unitary
it currently has a caretaker government.
Republic
Since Barack Obama is currently the President of the United States of America as I type (August 2011), yes, he works for a government, specifically, the US government.
Afghanistan is an Islamic Republic currently with a parliament. But the Taliban have taken over and threaten the government.
We have a federal system
According to the websites of Wikipedia AND the CIA, the government of Tanzania is a republic.
food.
republic
m
republic
The U.S. government is a constitutional republic.
a type of government for Indian tribal , and the us govt have branches and laws for the state