trade deal at risk with U.S

The threat by Cameron's ministers to back a UK exit in a referendum on the EU. Obama administration officials were concerned that the uncertainty over Britain's future would further complicate what is already a hard to get passed Congress. The U.S recognizes the important of U.K and EU trade. This affect international business because how this ends up or works out will change U.S and U.K relations because of the trading.

 http://www.guardian.co.uk/business/2013/may/27/eu-exit-risks-us-trade-deal#ixzz2UggGNSfW