DEMOCRATIC Republic of Congo President Felix Tshisekedi has appointed a new head of the army to replace General John Numbi, according to state television. Both Numbi and his designated successor, General Gabriel Amisi Kumba, are under U.S. and European Union sanctions for repression and abuses directed against opposition figures and protesters under former president Joseph Kabila. Tshisekedi's office did not give a reason for the reshuffle. The last month has seen rising tensions in the ruling coalition between supporters of Tshisekedi and those of Kabila, who maintains extensive power through his parliamentary majority, control of most cabinet ministries, and influence…