Murat... Acquire Licensing Rights Read moreANKARA, Nov 10 (Reuters) - Turkish President Tayyip Erdogan waded into a brewing judicial crisis on Friday, criticising the Constitutional Court for "many mistakes" and backing an unprecedented challenge to it by an appeals court, as opponents marched in Ankara. In a twist - which critics said highlighted the diminished state of Turkey's legal system - the top appeals court said the Constituional Court's ruling was unconstitutional. "The Constitutional Court cannot and should not underestimate the step taken by the Court of Cassation on this matter," he said. They were headed to the appeals court and video showed they were briefly delayed by police. "The Court of Cassation's backlash (...) is an open and combative attack against the Constitutional Court," said Bertil Oder, professor of constitutional law at Koc University.

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Persons: Tayyip Erdogan, Ozgur Ozel, Mustafa Kemal Ataturk, Murat, Tayyip Erdogan waded, Erdogan, Osman, Bertil Oder, intimidates, Ezgi Erkoyun, Jonathan Spicer, Emelia Sithole Organizations: Republican People's Party, Cassation, Constitutional, AK Party, Union, Koc University, Thomson Locations: Ankara, Turkey, ANKARA, Uzbekistan