There are a number of factors working against a successful Doha Round conclusion. Several of these affect the linkages and trade-offs between the main elements of the Doha Round negotiating agenda, particularly agriculture, non-agricultural market access (NAMA), services, and rules. For most of the past six years, the negotiating difficulties in agriculture were regarded as the main constraint to concluding the Doha Round. However, in recent months, as the shape of the agricultural package became clearer, it has become apparent that there are also major obstacles to be overcome elsewhere in the negotiations; especially in NAMA.