In the U.S., There is a Maddening Lack of Uniformity on Voting Rules

Each state goes their own way:

Amber Pflughoeft beamed with pride as she filled out her ballot for the first time last month. A 20-year-old who'd been fighting bone cancer for a decade, she was fascinated with politics, her mother Tiffany Pflughoeft remembered. And after spending the last midterm election in the hospital following a bone marrow transplant, she was determined to vote this year. But just a few days after she mailed in her ballot, Amber's condition took a sudden turn for the worse. She went back to the hospital and died in late September. Now, her ballot will be thrown out under Wisconsin election law.