"I believe and still believe that the fact that we hadn't had a referendum on this issue for 40 years, despite the fact that the European Union was changing...Was actually beginning to poison British politics - it was certainly poisoning politics in my own party," he said during a speech at Depauw University in Indiana titled 'The Historic Events of 2016 and Where We Go From Here' as part of a US-wide tour.
"Britain has made its choice - I believe that choice will be carried through. I think it is right it is carried through and yes, there will be difficulties along the way because it's a big change, but ultimately it can be made to work," the 50-year-old added.
Britain voted 52 to 48 per cent in favour of Brexit on June 23. The shock vote to leavethe 28-member European Union cost Cameron his job as Prime Minister, leading to his resignation a day after the referendum.
Cameron, who was recently in India, has since set up a new company - The Office of David Cameron Ltd - to launch his new speaking career around the world.
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