Recently the top leaders of the AFL-CIO (Liz Shuler) and the SEIU (April Verrett) announced that the split was over. This month, the top leaders of the AFL-CIO (Liz Shuler) and the SEIU (April Verrett) announced that the split was over. To understand the role unions play in American politics, this statistic tells us a lot: in last years elections,18% of the voters came from union households, with 54% backing Harris and 44% voting for Trump.