Can you explain the significant difference between absentee and mail-in voting? They seem exactly the same to me, unless you meant early voting when you said absentee voting.
Don’t quote me on this but I believe absentee voting is for Americans living abroad, whereas voting by mail is for Americans residing in the country that don’t wish to go to the polls. My wife, is casting an Absentee ballot from Toronto. Her parents are voting by mail from Florida.