Angola's foreign policy is premised on the imperatives of continued influence with key trading partners (Portugal, China, Brazil, and Russia), immunity from Western pressures as a result of its petro-power, and retaining influence in Africa through military and commercial agreements. Member states of the European Union (EU) also play an important role in trade and policy issues, although attempts to change the existing dynamics could render the EU-Luanda relationship a more constructive and transformative engagement. As it stands, Europe has influence in rather limited areas of Angola's domestic and foreign policy, although the pressure points exist for the EU to take a more dynamic approach. Through the dynamic expansion of the national oil company's investments in diverse sectors, Sonangol is slowly but surely building an empire that extends throughout Africa, Europe, and Latin America. Luanda does not engage economically without securing a politically conducive environment – a tendency that will continue, given its need to ensure regime stability and the continued influence of the Dos Santos dynasty.