Cairo - US President Donald Trump called Egyptian President Abdel-Fattah El-Sisi on Thursday and said he was keen to overcome any obstacles in the way of cooperation, just days after the US said it would withhold some financial aid to Egypt. "President Abdel-Fattah El-Sisi received a phone call tonight from US President Donald Trump who affirmed the strength of the friendship between Egypt and the United States and expressed his keenness on continuing to develop the relationship and overcome any obstacles that might affect it," El-Sisi's office said in a statement late on Thursday.