In the 1945 general election he won Carmarthen, taking the seat from the Labour Party's Moelwyn Hughes despite the rest of the country experiencing a Labour landslide. Morris was to hold the seat for the remainder of his life. In 1951 he became Deputy Chairman of Ways and Means in the House of Commons and thus one of the Deputy Speakers. This post, together with his age, combined to exclude him for consideration for the Liberal Party leadership when Clement Davies stood down in October 1956. Morris died the following month, aged 68. Throughout his career Morris was a staunch individualist, once summing up his political philosophy as, "There is no man alive who is sufficiently good to rule the life of the man next door to him!" Many have regarded him as being the last representative of traditional Gladstonian Liberalism in the Commons.