US President Donald Trump called his Turkish counterpart Recep Tayyip Erdogan to congratulate him on winning the referendum boosting his powers, Turkish state media reported.<br/><br/>Trump called Erdogan tonight and congratulated him on his success in the referendum, Turkish presidential sources said, quoted by state-run news agency Anadolu yesterday after Erdogan won over 51 per cent in Sunday's vote. <br/><br/>The reaction from Trump contrasts with EU leaders who have been reserved in their reaction to the narrow victory while monitors expressed concern over the unlevel playing field.