Arizona Voter Registration Edge (R-D):
2008: Repub edge over Dem: 96,335
Result: McCain wins by 195,404
2012: Rep edge: 168,061
Result: Romney wins by 208,422
2016: Rep edge: 148,291
Result: Trump wins by 91,234
2020: Rep edge: 113,098 (could be more, see below
Result: ??