▁ ▁Multi - party ▁system ▁▁ ▁The ▁b ic amer al ▁system ▁of ▁the ▁Ott oman ▁parliament — com posed ▁of ▁an ▁upper ▁house , ▁the ▁Senate ▁of ▁viz iers , ▁assigned ▁by ▁the ▁Sultan , ▁and ▁the ▁lower ▁house , ▁the ▁Chamber ▁of ▁Deput ies , ▁selected ▁by ▁two - level ▁elections — was ▁dissol ved , ▁which ▁had ▁already ▁been ▁def unct ▁since ▁the ▁Al lied ▁occupation ▁of ▁Ist an bul ▁in ▁ 1 9 2 0 ▁and ▁consequ ently . ▁ ▁The ▁foundation ▁of ▁the ▁Turkish ▁Grand ▁National ▁Assembly ▁followed ▁the ▁dissol ution ▁of ▁the ▁lower ▁house ▁of ▁the ▁Ott oman ▁parliament . ▁The ▁new ▁system , ▁which ▁gave ▁prim acy ▁to ▁national ▁independence ▁and ▁popular ▁so vere ig nt y , ▁established ▁the ▁offices ▁of ▁Prime ▁Minister ▁and ▁President ▁while ▁placing ▁legisl ative ▁power ▁within ▁a ▁un ic amer al ▁Grand ▁National ▁Assembly . ▁The ▁Assembly ▁was ▁elected ▁by ▁direct ▁election ▁using ▁proportional ▁representation . ▁It ▁was ▁based ▁on ▁Party ▁system , ▁which ▁govern ance ▁by ▁political ▁parties ▁was ▁adapted . ▁The ▁only ▁political ▁party ▁was ▁the ▁" Pe ople ' s ▁Party " ▁( H alk ▁F ı r k as ı ), ▁which ▁was ▁founded ▁by ▁At at ür k ▁in ▁the ▁initial ▁years ▁of ▁the ▁independence ▁war . ▁In ▁ 1 9 2 4 ▁it ▁was ▁renamed ▁the ▁" Rep ublic an ▁People ' s ▁Party " ▁( C um h uri y et ▁H alk ▁F ı r k as ı ) ▁and ▁in ▁