Missouri Agrees is working on a referendum campaign to switch every election in the state to Approval Voting (AKA Freedom Voting). They're actually doing a fundraising campaign right now in order to pay for the effort.
If you don't know what Freedom Voting is, it's very simple.
Vote for everyone you like.
Most votes wins.
The short answer for why it's so great is that it means you're no longer limited to choosing just one candidate. You can pick everyone you like without having to worry about strategy. The long answer gets into polling data, voting theory, and even representing systems, but the big takeaway is that it's always safe to vote for your favorite no matter what.
If we can flip every election in Missouri with the proposed state constitution amendment, it'll be huge for voting reform for the nation as a whole, because we'll have a g whole state demonstrating how great Freedom Voting is compared to the status quo.
I'm always happy to chat, let me know if you have any questions.