The Supreme Court blocked Wisconsin’s attempt to extend absentee voting by allowing ballots that were postmarked after Tuesday’s primary elections to be accepted.

“Extending the date by which ballots may be cast by voters — not just received by the municipal clerks but cast by voters — for an additional six days after the scheduled election day fundamentally alters the nature of the election,” Supreme Court Justice Brett Kavanaugh said in the opinion for the 5-4 majority on Monday.

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