In the US, voter registration is completely open. You can walk down to your Board of Elections and look at the full register, including party registration and whether you voted or not.
For contested elections, party inspectors will note active voters who haven't voted yet and report, which generates phone calls or even volunteers dropping by to drive voters to the polls.
For contested elections, party inspectors will note active voters who haven't voted yet and report, which generates phone calls or even volunteers dropping by to drive voters to the polls.
IMO, transparency is required for democracy.