The constituency is majority
nationalist, though on its creation at the
1983 general election,
Jim Nicholson of the
Ulster Unionist Party won the seat due to the nationalist vote being divided between the
Social Democratic and Labour Party and
Sinn Féin. In 1986, Nicholson, along with all the other
unionist MPs, resigned his seat in protest over the
Anglo-Irish Agreement and
stood in a by-election to provide voters the opportunity to decide on it.
Seamus Mallon won the seat and held it at successive elections until his retirement in 2005. In the
2001 general election,
Sinn Féin cut into Mallon's majority, outpolling the SDLP in the equivalent area local elections held on the same day. In the
2003 Assembly election Sinn Féin won three seats to the SDLP's one. When Mallon retired in 2005
Sinn Féin won the seat.
Newry is overwhelmingly nationalist, and was one of two districts in Northern Ireland to return a numerical majority of people identifying themselves as "Irish" at the 2011 census at 52.1% Irish.
Armagh is more unionist, though it does have a larger proportion of people identifying as "Irish" in comparison to the Northern Ireland average at 44.4% "British" and 32.4% "Irish". ==Boundaries==