in the power of
• under the control of.
• "what happens to them is in the power of the management"
Similar:
have control over,
have influence over,
have under one's thumb,
have at one's mercy,
have in one's clutches,
have in the palm of one's hand,
have eating out of one's hand,
have on a string,
have one's claws into,
have in one's hip pocket,
have over a barrel,
