By Canan Sevgili and Mirac DereliMay 22 (Reuters) - A Turkish court annulled the main opposition party's 2023 congress, effectively ousting its leader Ozgur Ozel, in a ruling that has inflamed a political crisis, jolted financial markets and could prolong the 23-year rule of President Tayyip Erdogan.The decision comes against the backdrop of an extended crackdown that has seen the detention or jailing of hundreds of members of the opposition Republican People's Party (CHP) and several mayors.Here are some details on the crackdown:

A Turkish court has effectively removed the head of the country’s main opposition party by annulling a 2023 congress that elected him.

The ruling marks a major escalation in the legal crackdown on the CHP, which has already been hit by the imprisonment of Istanbul Mayor Ekrem Imamoglu, its presidential candidate.