Ministers of the Crown, and especially Cabinet ministers, are selected primarily from the elected members of the House of Commons, and from the House of Lords, by the prime minister. Cabinet ministers are usually heads of government departments, mostly with the office of "Secretary of State for e.g., Defence, Health and Social Care, Foreign Affairs etc.", usually simplified to "Defence Secretary, Health Secretary, Foreign Secretary etc.". Some cabinet ministers can be ministers without portfolio, either directly as such or (more commonly) by holding sinecure posts such as Lord Keeper of the Privy Seal, or otherwise empty titles such as First Secretary of State. Certain other cabinet ministers are in a somewhat hybrid position, where they have a portfolio, but do not head a government department; the lord president of the council being such an example, where that office has accreted a collection of responsibilities over time, but which does not have a lord president's department attached to it. Although generally the most powerful or prestigious members of the Cabinet head critical ministries such as the Foreign Office, ministers without portfolio can also be important components (for example Michael Heseltine as deputy prime minister in the Second Major ministry). The most powerful Cabinet minister, the prime minister, heads no department, although the Prime Minister's Office co-ordinates their oversight of the whole government.