<p>Traditional mobilization tactics pre-suppose that the best (if not only) indicator of likelihood of voting in the future is voting in the past. However, there are many forms of political participation that are utilized and needed for a healthy democracy to function. Establishing a consistently participatory and representative electorate requires a broader understanding of the gateways through which people enter politics. This project examines one such gateway, asking: Can an incidental form of political participation impact future likelihood to participate in politics? Using a novel dataset that tracks four forms of participation with administrative data and multiple statistical tests, I find that individuals who are invited to and participate in signing a petition are more likely to participate in multiple forms of political activity in the future. This is the case for both individuals who have and who have not been as active in politics in the past.</p>