Bruno Le Maire, former French Economy Minister, suggests that a coalition of six core European countries is the best way to strengthen the EU, rather than involving all 27 member states. He emphasizes the need for unity among France, Germany, Italy, Spain, Poland, and the Netherlands to effectively address global challenges and pressures, particularly from the US. Le Maire's proposal aligns with the existing 'E6' coalition aimed at fostering decisive action in key strategic areas.