Who is the ruler of Sudan?

In Northern Sudan Omar Al-Bashir is the president. The north is Arab/Muslim.

The South has recently become independent although it is not recognized by all countries, Nothern Sudan has granted independance. In the South, the president is Salva Kiir...I think that's how you spell it, and the VP is Dr. Riek Machar. Salva Kiir is a military man, and Machar is an educated man...he went to school at Oxford I think. Machar is really the leader although not in name.