Assistant of President of the Republic, Abdul-Rahman Al-Saddiq has discussed at the Republican Palace with the US Charge d' Affaires to Sudan, Joseph Stafford, progress of the bilateral relations and ways of boosting them. Stafford expressed his country's welcome to the efforts being exerted by Sudan and South Sudan to reach the cooperation agreement which was signed by two countries in Addis Ababa, stressing his country's support to the cooperation between Sudan and South Sudan.