Will the expansion of the EU now come to a halt?

Probably not. The EU has promised the Balkan countries they can all join when they meet the conditions. Croatia and the Former Yugoslav Republic of Macedonia are already officially labelled as "candidates" for membership.

However, most experts expect the EU to go slow on further enlargement from now on. For one thing, opposition to the whole process is growing in some member states. For another, EU treaties will have to be revised before any more countries can join. Experts say the EU may be prepared to "tinker" with treaties to allow Croatia in, but major reform will be necessary after that.

References Q&A: EU enlargement