一党 いっとう優位 ゆうい政党 せいとう せいでしょう
ittō yūiseitōseideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 一党優位政党制

1. Likely a two-party system.; Probably a two-party system.

Polite
Presumptive
Conjecture