The ruling means the 30 states that accept ballots late if they are postmarked by Election Day will continue to be able to do so.
The court rejected Republicans’ argument that federal law prevails over a Mississippi law permitting late-arriving ballots.
Violations can result in confiscation of the device plus fines and prison time.
Forecasters were monitoring Tropical Storm Arthur for cyclonic activity as it made landfall June 17.
The high court ruled the trial judge misapplied a legal precedent dealing with selecting jurors.
The high court said vote-dilution claims against Mississippi and North Dakota need to be reexamined after its recent landmark redistricting ruling.
A Faint Meow in the Rubble of a Mississippi Tornado Leads to a Stunning Rescue.
The justices, who have yet to issue a final decision, declined to overturn a lower court ruling that the referendum process violated the state constitution.
State lawmakers are waiting for the Supreme Court to decide a landmark voting rights case before they meet to redraw districts.
The state Republican Party argues federal law prevails over a Mississippi law permitting late receipts.
An appeals court previously held that a Mississippi law allowing late-arriving ballots to be counted violated federal law.
A federal appeals court previously rejected Gabriel Olivier’s challenge to the Brandon, Mississippi law.
The 78-year-old congressman is a longtime civil rights leader.
Customers can get full refunds for returned items at most stores.
The ruling gives the federal government an advantage in immigration enforcement, legal experts say.
About 12,000 people in Mississippi are still without power as of Feb. 7, according to PowerOutage.us.