Allies of ousted Republican People’s Party (CHP) leader Özgür Özel are preparing to challenge the main opposition movement’s internal leadership crisis in court, escalating a dispute over whether an extraordinary convention should be convened to reset the governing bodies.

Two rival camps in the main opposition CHP engage in another showdown this week as Özgür Özel plans blocking chair Kılıçdaroğlu’s parliamentary...

Ousted main opposition leader Özgür Özel has sought to address his party’s weekly meeting in parliament set for June 23, as the rival administration moves ahead with parallel…