2 This analysis uses exit poll data from the U.S. 2016 presidential election, together with preelection polling data from the 2019 British election. We were not able to use exit poll data for the 2019 election because the data that does exist (the Lord Ashcroft Poll data we used earlier) used different category classifications. While slightly inconvenient, this should not make that much of a difference to the results as many of the young voters that did switch their votes in the 2019 elections switched them to other left-wing parties and so end up in the same basket in our analysis.
Obviously, these political systems are quite different and so we have had to create our own categories. Setting up the U.S. baskets was simple and only depended on whether the voters opted for Donald Trump or Hilary Clinton. In the UK we have counted voters who supported Labour, the Liberal Democrats, the Greens or the SNP as “Left” and voters that supported Conservatives or the Brexit Party as “Right.”