A main figure in Istanbul legislative issues has showed up in court over allegations she offended President Erdogan and the Turkish state on the web.
Canan Kaftancioglu drives the Istanbul part of the common Republican People’s Party (CHP).
The restriction gathering guaranteed a shocking decision triumph over Turkey’s decision AK party in Istanbul’s mayoral race a weekend ago.
Ms Kaftancioglu could face as long as 17 years in jail.
Hundreds appeared up to court to support Ms Kaftancioglu on Friday. Her trial has now been adjourned until 18 July.
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The newly inaugurated Istanbul mayor, Ekrem Imamoglu, has alleged the charges against Ms Kaftancioglu amount to “political interference”.
“It is an attempt to restrict rights and freedoms. I will always stand by her,” he said.
Mr Imamoglu’s victory came after an earlier March result was annulled over alleged irregularities.