John Martin McDonnell is a British Labour Party politician who was appointed the Shadow Chancellor of the Exchequer in September 2015. He has been the Member of Parliament for Hayes and Harlington since the 1997 general election.
Biography：John Martin McDonnell is a British Labour Party politician who was appointed the Shadow Chancellor of the Exchequer in September 2015. He has been the Member of Parliament for Hayes and Harlington since the 1997 general election.
