Parliamentary Private Secretary to the Prime Minister Bonar Law's Parliamentary Private Secretary, J.C.C. Davidson acted in effect as his Chief of Staff. Margaret Thatcher's downfall from the Conservative Party leadership in 1990 is attributed by many to the actions of her Parliamentary Private Secretary, Peter Morrison, in failing accurately to count votes amongst Conservative backbenchers. Some Parliamentary Private Secretaries to the Prime Minister go on to hold higher office; Lord Dunglass served as Parliamentary Private Secretary under Neville Chamberlain and later went on to serve as Prime Minister in his own right. There can be multiple Parliamentary Private Secretaries to the Prime Minister at a given time.
Prime Minister of Cuba referred to as being the country's "prime minister". The incumbent since 19 April 2018 has been Miguel Díaz-Canel, who took over from Raúl Castro on that date. Prime Minister of Cuba The Prime Minister of Cuba () – official title: President of the Council of Ministers () – is the head of the Council of Ministers of Cuba. The office of Prime Minister was first instituted in 1940 in accordance with the provisions of the Constitution of Cuba as amended in that year. The first Prime Minister of Cuba was Carlos Saladrigas Zayas (1900–1957), the nephew of former President Alfredo