ankara turkey nationalist opposition seek support rule ak party low 10 percent threshold enter parliament party official say thursday sign new rival political party could shake turkish politics former interior minister meral aksener break nationalist movement party mhp form iyi parti good party last month pose challenge mhp president tayyip erdogan ak party speak reporters ankara mhp deputy chairman semih yalcin say party could fall threshold iyi parti apparent early popularity sustain would push low barrier mhp preparations regard threshold electoral law discuss depend offer receive ak party yalcin say day mhp leader devlet bahceli call threshold harsh since 1982 political party turkey need win least 10 percent vote represent 550-seat parliament country face presidential parliamentary elections 2019. recent poll suggest aksener party could overtake main opposition secular chp push mhp pro-kurdish opposition hdp parliament force share vote current threshold would also cut ak party share vote islamist-rooted ak party lead erdogan broad organization count among rank nationalists religious conservatives iyi win 20 percent one percent see ... everyone see hold stand front people 2019 yalcin say iyi parti mhp much 18 percent vote 1999 parliamentary election slip threshold 9.5 percent 2002. exceed 10 percent since executive presidential system approve april referendum president give expand power number mps increase 550 600 parliament authority reduce critics argue low threshold result change composition parliament would great impact new presidential system ak party found erdogan dominate turkish politics since 2002 hold majority parliament 15 years win almost 50 percent vote late parliamentary elections 2015 erdogan party officials say aim win half vote 2019. turkish nationalist opposition seek secure parliamentary future