hold the reins
US /hoʊld ðə reɪnz/
UK /hoʊld ðə reɪnz/
1.
掌权, 控制
to be in control of something, especially an organization or a country
:
•
She's the one who truly holds the reins in this company.
她才是这家公司真正掌权的人。
•
After the election, the new party will hold the reins of government.
选举后，新党将执掌政府。