A university has invalidated Istanbul Mayor Ekrem Imamoglu's diploma in a move widely perceived as politically motivated to block him from from running in the next presidential race.

Turkey revoked Istanbul Mayor Ekrem Imamoglu’s university diploma, potentially blocking President Recep Tayyip Erdogan’s main rival from running for the country’s top office.Most Read from BloombergICE Eyes Massive California Tent Facility Amid Space ConstraintsHow Britain’s Most Bike-Friendly New Town Got BuiltThe Dark Prophet of Car-Clogged CitiesWashington,

Istanbul University said on Tuesday it had annulled the degree of President Tayyip Erdogan's main political rival over irregularities, dealing a blow to the opposition days before it was set to pick him as its presidential candidate in the next election.