Catriona MacDonald is running for the SNP in Edinburgh Southern at the Holyrood election. Photograph: Gordon Terris HIGH-PROFILE support for Scotland's membership of the European Union demonstrates the door is open for the country to rejoin, according to SNP candidate Catriona MacDonald. Leading academics, writers, and political thinkers have backed 'Europe for Scotland’, a new campaign group supporting Scottish EU membership on the continent. In an open letter to leaders in Brussels and government heads of the EU27, it calls for them to make explicit before an independence referendum that Scotland will be welcomed back swiftly and under an exceptional process because of previously being a member.