Question: Robert Richardson served as a family physician for Alexander Campbell, who was a Scots-Irish immigrant, who later became what in the United States?
Sentence (from "Alexander Campbell (clergyman)"): Alexander Campbell (12 September 1788 – 4 March 1866) was a Scots-Irish immigrant who became an ordained minister in the United States and joined his father Thomas Campbell as a leader of a reform effort that is historically known as the Restoration Movement, and by some as the "Stone-Campbell Movement."
Relevant evidence: Yes