Mesut Ozil joins Erdogan's AKP party / AKP prepares for congress, CHP closes applications for presidential primary / Fourth term for Erdogan 'on our agenda', ruling AKP spokesperson says / After unsuccessful spell in opposition, Davutoglu says 'never broke away' from AKP base / Former AKP senior criticizes presidential system, says AKP depends on MHP for majority / Former AKP MP wants reconciliation with Hizbollah after PKK / Former AKP MP calls on Erdogan to leave presidency 'at the peak' / Erdogan 'risked death while expanding freedoms,' senior AKP figure argues / AKP gov't to impose highest taxes in 20 years to 'combat economic crisis' / MHP leader Bahceli says AKP, CHP should form alliance