How: The removal process is triggered if you don't vote, respond to a notice or make contact with election officials over a three-year span. Then if you don't vote or make contact in two more federal election cycles, you'll be purged from the rolls. The process takes seven years.

Estimated number: 107,000 in 2017*

Why: "So you think we should just leave people alone in perpetuity? I mean, what happens if they move to another state? People all the time move to another state, and they don't tell us and end up getting on the voter rolls in two different states. We've had the same person voting twice in two different states in presidential elections. So there's a reason you keep the voter rolls current and up to date."** -Republican Secretary of State Brian Kemp

How: Removal process triggered for anyone who doesn't vote in a single election. If a person doesn't respond to a notice, vote or otherwise make contact with officials in two more election cycles, then they're purged from the rolls. The process takes six years.

Estimated number: 50,000 in 2015 and 2016*

Why: "This is voter roll maintenance, and, essentially, an individual has to go six years. Six years, which is at least 12 elections — if there's a special election in there, that's more than 12 elections — without participating in an election, without having any interaction with their board of elections and without responding to notices that are sent to them before they're removed." -Sam Rossi, press secretary for Republican Secretary of State Jon Husted