hold all the aces
Also, hold all the trumps. Be in a winning position, as in We can't argue with Jeff; he holds all the aces, or If Jean refuses, he'll reveal that he holds all the trumps and force her to give in. These expressions allude to card games in which the ace or a trump card outranks all the others. Also see play one's cards right; trump card.
Words nearby hold all the aces
hold 'em,
hold a candle to, not,
hold a grudge,
hold a gun to someone's head,
hold against,
hold all the aces,
hold at bay,
hold back,
hold button,
hold court,
hold down