The terms democratic and republican are NOT opposites. It is possible to have a democratic government as a republic or as a monarchy.
This means that your question can not be answered.
Sudan titles itself as "Republic of the Sudan", a Federal presidential, constitutional republic.
However, Sudan is known to be one of the most corrupt nations on Earth and while this state persists whatever Sudan titles itself is meaningless - there is no effective government of any form, the country is anarchic and riddled with Muslim extremism.
The ordinary people of Sudan need to take charge of their country in order to solve their problems and join the civilised countries of the world.
A communist party does exist in South Sudan, but it does not control the government, so no, South Sudan is not a communist country.
South Sudan Communist Party was created in 2011.
Sudan is due south of Egypt.
The world's newest country is South Sudan, which gained independence from Sudan on July 9, 2011.
The newest African country is South Sudan, which gained independence from Sudan in 2011.
Juba is the capital and largest city of the Republic of South Sudan. South Sudan is the world's newest country. South Sudan declared independence from Sudan on July 9, 2011.
Sudan is the country situated directly south of Egypt.
south sudan
South Sudan declared independence from Sudan July 9, 2011.
Darfur is a region in south western Sudan. Sudan is a country in the continent of Africa.
One of the worlds poorest countries
South Sudan is scheduled to become the newest country on 9 July 2011.South Sudan (officially the Republic of South Sudan), on 9 July 2011 at 12:01 a.m. local time, became independent from Sudan.
If it is south Sudan then north Sudan but if it is north Sudan, It is Eygpt.