infighting
n[U]
1 (in boxing) fighting in which the opponents are very close to or holding on to each other (拳擊)接近戰.
2 (fig infml 比喻, 口) fierce competition between rivals (eg involving intrigue, betrayal, etc) 對手間的激烈競爭(如事涉陰謀、 出賣等)
I gather a lot of political infighting went on before he got the top job. 我看他一定經歷了政治上諸多明爭暗斗才獲此高位.