ANKARA, April 26 (Reuters) - Turkish President Tayyip Erdogan canceled his scheduled campaign rallies on Wednesday and Thursday for health reasons, weeks before May 14 presidential and parliamentary elections. Later, AK Party deputy chair Erkan Kandemir said Erdogan would attend a ceremony at the Akkuyu nuclear power plant in the southern Mersin province via videolink on Thursday. See here for a complete list of exchanges and delays