power broker

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++ˈpower ˌbroker, power-broker noun [countable]  POWERsomeone who controls or influences which people get political power in an area 〔操纵某地区政治势力的〕权力经纪人，权力掮客 —power-broking noun [uncountable]

Examples from the Corpus

power broker• Karajan was comfortable with his stature as a power broker and not at all shy about wielding his influence.• It was a dramatic transformation, from society hostess to Democratic Party power broker.

ˈpower ˌbroker nounChineseSyllable  

who influences or get which Corpus people controls someone political

power broker
ˈpower ˌbroker , power-broker noun [countable]
someone who controls or influences which people get political power in an area
—power-broking noun [uncountable]

power brokerBrE /ˈpaʊə brəʊkə(r)/ 🔊NAmE /ˈpaʊər broʊkər/ 🔊 nouna person who has a strong influence on who has political power in an area 能左右当权者的人；权力经纪人