For the eight years Chris Green has been a Conservative MP in Bolton, the borough has helped make up the Greater Manchester combined authority led by a Labour mayor.
And going back much further than that, it was 1974 when Bolton left Lancashire for administrative purposes to become part of Greater Manchester under the Local Government Act.
So where does Bolton West Mr Green, who was elected in 2015, stand on the debate about whether Bolton belongs in Greater Manchester or should return to the historic county of Lancashire?