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?

Context paragraphs:
Alexander Robert Richardson: Alexander Robert Richardson (4 July 1847 – 2 May 1931) was an Australian pastoralist and politician.  He made a fortune through the development of pastoral leases in the North-West, and later served in both houses of the Parliament of Western Australia.  He was a member of the Legislative Council from 1887 to 1890 and a member of the Legislative Assembly from 1890 to 1897, and served as a minister in the government of John Forrest.

Appleyard (Greencastle, Indiana): Appleyard, also known as the Alexander C. Stevenson Farm, is a historic farm located on the south side of State Road 240 2 mi east of Greencastle in Putnam County, Indiana.  The farm was the home of Alexander Campbell Stevenson, an Indiana politician and agriculturalist.  Stevenson founded the farm in 1843 while serving in the Indiana House of Representatives; he later served as speaker of the assembly.  Stevenson bred shorthorn cattle and merino sheep on his farm using modern methods and became a prominent agricultural expert in Indiana.  As a result of his efforts, Stevenson was appointed to Indiana's first State Board of Agriculture in 1851; during his tenure on the board, he helped establish the Indiana State Fair.  Stevenson later served as president of the Indiana Shorthorn Breeders Association and the American Shorthorn Breeders Association.

James Campbell (industrialist): James Campbell, Esq. (February 4, 1826 – April 21, 1900) was a Scots-Irish industrialist in sugar cane processing, who became one of the largest landowners in the United States Territory of Hawaiʻ i, and a real estate developer.  He was an immigrant to Hawaiʻ i from Ireland.  At the age of 51, he married for a second time, to a young woman who was a daughter of Hawaiian aristocracy.  They had eight children, four of whom survived to adulthood.  One of their daughters married into the ruling family, and their grandchildren were heirs to the throne of the kingdom of Hawaii.

Gen. Alexander Campbell House: The Gen. Alexander Campbell House is a historic house on United States Route 1 in Cherryfield, Maine.  Built in 1790, the originally Federal-style house underwent a number of alterations in 19th century, and now has a somewhat Victorian appearance.  The house is notable for being built by Alexander Campbell, a leading figure of Down East Maine during the American Revolutionary War and the subsequent decades.  The house was listed on the National Register of Historic Places in 1977, and is a contributing element of the Cherryfield Historic District.

Campbell of Auchinbreck: The Auchinbreck of Campbell family (also spelled Auchenbreck, Achnabreac, etc., from Scots Gaelic "Ach[adh] nam Breac" meaning either Field of the Trout or Speckled Field), was founded by Duncan Campbell of Kilmichael, in Glassary, Argyllshire, Scotland.  He was the son of Duncan, first Lord Campbell of the Clan Campbell, by his second wife Margaret, daughter of Sir John Stewart of Blackhall, the illegitimate son of King Robert III of Scotland.  The family of the Lords Campbell later became Dukes of Argyll, and remain chiefs of Clan Campbell.  Duncan Campbell, as a grandson of King Robert III, received a considerable estate confirmed by royal charter dated 19 June 1452.  The family remained at their estate of Auchinbreck, from which they took their title, until 1641.  The Campbells of Auchinbreck were commissioned to provide military training and were used by the Earls of Argyll as military support.  In 1628 the then head of the family of Campbells in Auchinbreck received a baronetcy, which included a grant of North American land in Nova Scotia.

Robert Richardson (religion): Dr. Robert Richardson (1806 – 1876) was an American medical doctor who spent much of his life teaching and working as an administrator at Bethany College.  He served as family physician for Alexander Campbell, noted Restoration Movement pioneer, for well over 30 years.  He was also associate editor for Campbell’s "Millennial Harbinger" magazine for nearly 30 years.

William Caldwell (ranger): William Caldwell (c. 1750 – 20 February 1822), was a Scots-Irish immigrant to North America who became a soldier with the British Indian Department.  He fought against the American rebels in the American Revolutionary War, especially with Butler's Rangers, based near upstate New York.  After the war, together with other Loyalists, Caldwell was granted land in Upper Canada (now Ontario).  He helped found the town of Amherstburg, near the mouth of the Detroit River.  He also served as a lieutenant colonel in the War of 1812, and from 1814-1815 as the Superintendent of Indians in the Western Department.  He was a merchant and farmer in Amherstburg.

Cockburn-Campbell baronets: The Campbell, later Cockburn-Campbell Baronetcy, of Gartsford in the County of Ross, is a title in the Baronetage of the United Kingdom.  It was created on 3 July 1821 for Lieutenant-General Alexander Campbell, with remainder, in default of male issue of his own, to 1) the male issue of his daughter Olympia, failing which 2) to the male issue of his daughter Isabella Charlotte.  He had already been created a baronet on 6 May 1815, with normal remainder to heirs male.  Campbell had earlier fought at the Battle of Seringapatam in 1799 and commanded a division during the Peninsular War.  The creation of 1815 became extinct on his death in 1824 while he was succeeded in the 1821 creation by Alexander Thomas Cockburn, who assumed the additional surname of Campbell the same year.  The fourth Baronet was President of the Legislative Council of Western Australia.  The sixth Baronet was the author of the autobiography "Land of Lots of Time".

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."  It resulted in the development of non-denominational Christian churches, which stressed reliance on scripture and few essentials.

John Savage (politician): John Patrick Savage, OC, ONS (May 28, 1932 – May 13, 2003) was a Welsh-born Canadian physician and politician.  Savage was the 23rd Premier of Nova Scotia between 1993 and 1997.  He was born in Wales, and educated in both the United Kingdom and Ireland.  He immigrated to Canada in 1967 and was a noted family physician in Dartmouth, Nova Scotia.  He became the mayor of Dartmouth in 1985, and won re-election twice.  He then became the leader of the Nova Scotia Liberal Party in 1992 and stepped down as mayor.  In 1993, he defeated the incumbent provincial government and became premier.  Savage was a controversial premier, bringing in many reforms in taxation, regional government, and government hiring practices.  He resigned as premier in 1997 due to his low approval ratings in public polls.  He died of cancer at the age of 70 in 2003.  He was the father of Mike Savage, current mayor of the Halifax Regional Municipality.

Supporting paragraphs: Robert Richardson (religion) Alexander Campbell (clergyman)
Answer: an ordained minister