ISTANBUL (AP) — The head of Turkey's main opposition party visited jailed Istanbul Mayor Ekrem Imamoglu on Tuesday after six nights of massive protests calling for his release.

Imamoglu, , is seen as the main challenger to President Recep Tayyip Erdogan’s 22-year rule. His arrest has been widely viewed as and sparked demonstrations, some turning violent, across the country. The government insists Turkey’s judiciary is independent and free of political influence.

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