The big picture: The high court yesterday morning upheld a Mississippi law allowing mail-in ballots that arrive after Election Day to be counted, as long as they were postmarked by the day of the election and arrive within five business days.
Nothing in federal law requires the ballots to be received by Election Day, and the decision is left to the states, the court ruled.
Yes, but: Arizona law requires that ballots be received by the time polls close on Election Day.
"As a result, today's decision does not change how elections are conducted in Arizona," Secretary of State Adrian Fontes said in a press statement.
The bottom line: If you mail in your primary ballot, do it by July 14, Fontes counseled.
Otherwise, you can bring it to a drop box or in-person voting location by 7pm on Election Day (July 21).