hold all the aces
/ˌhəʊld ˌɔːl ðə ˈeɪ.sɪz/idiom
to be in the strongest position, with all the advantages
иметь все козыри на руках
Русский аналог: «все козыри на руках»
Близкий вариант: hold all the cards. Обратное: be on the back foot.
“In these negotiations, the buyer holds all the aces.”
“With three other offers on the table, she held all the aces.”
“We can’t push for more: they hold all the aces.”