Turkish police arrested Istanbul's mayor Ekrem İmamoğlu, a key rival of President Erdoğan, amid a crackdown on opposition. İmamoğlu is accused of being a 'criminal enterprise ringleader' and is suspected of aiding the PKK. His party's presidential candidate elections are imminent, and his degree has been annulled, potentially disqualifying him. The crackdown also targets opposition collaboration in municipal elections, with allegations of corruption against İmamoğlu and his aides. Teljes cikk (Euronews.com)