Newcastle's growing independence from Walpole was helped by the support of his brother and his best friend, Hardwicke, who had become Lord Chancellor. During the latter half of the decade, his job was increasingly dominated by managing relations with Spain, which included trade disputes and objections to the controversial founding of the American colony of Georgia in 1733. The longstanding peace policy was now beginning to look extremely fragile. He also acted as a mediator in the War of the Polish Succession, helping to bring the conflict to an end in 1738.