US voting machines and other important votes

The video tutorial explains different voting methods, including optical scanners and e-voting machines. Optical scanners require voters to fill out paper ballots, which are then scanned. E-voting machines, or DREs, allow voters to make selections on a screen using a voter card. The tutorial also discusses absentee ballots, used by overseas voters, and provisional ballots, given to those with ID issues or at incorrect polling stations.

Explain the role of voter cards in the voting process.

Who receives provisional ballots and why?