Donald Trump has said Britain would be better off outside the European Union, just weeks after US President Barack Obama travelled to London to warn against a Brexit. The presumptive Republican presidential nominee conceded on Fox News Thursday that it was up to the British people to decide their future. Bur he said his personal "feeling" was that Britons should vote to leave the EU in the upcoming June 23 referendum on a so-called Brexit. Trump argued that the migrant crisis rocking the European Union was in part brought on by the bloc itself.