Closed primaries are the biggest form of voter suppression in the country. In 75% of elections, the outcome is determined in the first round of voting – the primary. 26 million voters, including almost half of all millennial voters, were barred from voting in presidential primaries in 2016. Millions more registered Democrats and Republicans were prevented from voting for the candidate of their choice. For presidential, congressional and state primaries, Open Primaries is moving from a fringe issue to a solid plank in a portfolio of political reforms.