He was succeeded by his eldest son, the fourth marquess. The fourth marquess was also an influential Conservative politician and served as Lord Privy Seal, as President of the Board of Trade, as Lord President of the Council, as Chancellor of the Duchy of Lancaster and as Leader of the House of Lords. Like his father he was regarded as a staunch Conservative and bitterly opposed the Parliament Act 1911, which sought to curtail the powers of the House of Lords.