Calling for a “rules-based” immigration system is a “classic left-wing position” for a party that supports the working class, Mary Lou McDonald has said. The Sinn Féin leader said she would “contest absolutely” the claim that her party, which has positioned itself as the prospective lead of the State’s first left-wing government, is not truly left wing. Some within the unified Opposition parties, such as Labour and the Social Democrats, have already publicly and privately questioned Sinn Féin’s left-wing credentials. McDonald’s party has been criticised for the stance it has adopted on a number of policy issues, including immigration. “I...