Supplementary Material Table A1. Parties included in CIG survey and analysis with CHES data (Polk et al., 2017) on European Integration Country English Party Name (acronym) Party EU Party Name Position EU Salien ce Belgium Christian Democratic and Flemish (CD&V) 6.6 4 Christian Social Party (CDH) 6.4 3.4 Ecologists (Ecolo) 6.3 3.8 Flemish Interest (VB) 2.6 4.6 Francophone Socialist Party (PS) 6 3.2 Green! 6.2 3.8 New Flemish Alliance (N-VA) 5 3 Open Flemish Liberals and Democrats (O-VLD) 6.6 3.6 Reform Movement (MR) 6.4 4.4 Socialist Party Different (SPa) 6 3.8 5.8 (1.2) 3.8 Belgium Mean (SD) (0.5) Netherlands 50Plus 4.8 4.8 Christian Democratic Appeal (CDA) 5.5 4.7 Christian Union (CU) 3.4 5 Democrats’66 (D66) 6.8 7.5 Green Left (GL) 6.5 6.4 Labour Party (PvdA) 5.5 4.9 Party for the Animals (PvdD) 3.7 6 Party of Freedom (PVV) 1.1 8.4 People’s Party for Freedom and Democracy (VVD) 5.2 4.5 Reformed Political Party (SGP) 2.6 5.3 Socialist Party (SP) 2.1 6.7 4.3 (1.8) 5.8 Netherlands Mean (SD) (1.2) Lithuania Election Action of Lithuania’s Poles (LLRA) 4.2 3.7 Homeland Union—Lithuanian Christian Democrats (TS- 6.5 8.3 LKD) Labour Party (DP) 5.1 5.3 Liberal Movement (LRLS) 6.5 7.6 Lithuanian Peasant and Green Union (LVLS) 4.7 5.1 Lithuanian Social Democratic Party (LSDP) 6.6 7.7 Order and Justice (TT) 3.2 6.1 The Way of Courage (DK) 3.1 2.9 5.0 (1.4) 5.8 Lithuania Mean (SD) (1.8) Slovenia Democratic Party of Pensioners of Slovenia (DeSUS) 5.8 5.5 1 New Slovenian Christian People’s Party (NSI) 6.5 7.2 Slovenian Democratic Party (SDS) 6.4 7.5 Slovenian People’s Party (SLS) 6.1 6.8 Social Democratic Party (SD) 5.8 6.3 6.1 (0.3) 6.7 Slovenia Mean (SD) (0.7) Italy Democratic Party 6.6 7.6 Five Star Movement 1.4 8.9 Northern League 1.1 8.9 People of Freedom 3.4 5.9 3.1 (2.2) 7.8 Italy Mean (SD) (1.2) Note: Party EU Position: (1= strongly opposed; 7=strongly in favour); Party EU Salience: (0 = European integration is of no importance; 10 = European integration is of great importance). The data is based on the 2014 Chapel Hill Expert Survey data Reference: Polk, J., Rovny, J., Bakker, R., Edwards, E., Hooghe, L., Jolly, S., . Zilovic, M. (2017). Explaining the salience of anti-elitism and reducing political corruption for political parties in Europe with the 2014 Chapel Hill Expert Survey data. Research and Politics, 4(1), 1–9. 2 .