Isolated regionally and under pressure, Félix Tshisekedi is becoming increasingly wary. M23's rapid territorial expansion - although this has slowed in recent weeks - has created a climate of suspicion at the very top tiers of government. Taken by surprise by the fall of Goma at the end of January, followed shortly afterwards by that of Bukavu, a defeat he considered almost impossible, the head of state no longer trusts his generals, who are accused of having profited from the enormous war effort