Hassan al-Turabi had called for President Bashir to surrender to the International Criminal Court on war-crimes charges.
The Army appears on verge of crushing Tiger rebels.
The arrest warrant for Sudan's president is indicative of the mounting pressure on the International Criminal Court to show results.
Hebert Veloza Garcia's extradition will stymie efforts to find justice for his victims, say Colombian human rights groups.
International aid groups fear the Sudanese government will respond by putting up more obstacles to their relief work.
Omar al-Bashir is the first sitting president to be indicted for crimes against humanity and war crimes. Critics worry the move could destabilize the country.
The International Criminal Court issued an arrest warrant Wednesday for President Omar al-Bashir on charges of war crimes and crimes against humanity.
On Syria, Iran, and a Palestinian state, Israel's new leadership disagrees with the Obama administration.
Growth threatens undiscovered layers of an empire that stretched from the Nile Valley to the Caucusus.