hold the whip hand of someone

• 占优势；处于支配地位；支配某人；控制某人；对某人占上风

hold the whip hand of someone的用法和样例：

例句

1. The Democrats hold the edge in the Senate.
   民主党人在参议院中占优势。
2. The tide turned and the champion prevailed.
   情势改变了而冠军占优势。