In the UK referendum I am likely to vote "IN" to remain in the EU but I get saddened by all the negativity and "spin" on both sides in this debate. The intervention by the current US president Obama does little good. We have not had a trade deal with the US before and who is likely to benefit? Well, the USA of course. Mr Obama, your intervention, although possibly well meant, is probably going to encourage people to vote "OUT". It is fine to have an opinion (like I am amazed by the support in the USA for Trump) but if you were in the EU you would not want the centralism in Brussels.
The EU needs to change and the UK is better in there shaping it in my view. Your intervention is likely to backfire Mr Obama and is not helpful I am afraid.