There is a difference between redistricting and gerrymandering. Redistricting to keep voting fair and equitable is legal (although it may be challenged in court).
Gerrymandering is drawing the voting districts in some way that increases or decreases the elective power of the votes cast in those districts.
Gerrymandering was one way that the Northern Ireland Protestant Unionists kept power in the province when there were as many or more Roman Catholics in a given area.
Gerrymandering is always unconstitutional since the Constitution guarantees equal rights to all.
The supreme court declared that gerrymandering was unconstitutional because it violated the 14th amendment.
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(Supreme Court)
It is not unconstitutional. The Supreme Court ruled that it is constitutional.
It allowed the Supreme Court to overrule an unconstitutional law.
The Supreme Court prohibited racial gerrymandering in 1993, holding that the practice violated the 14th Amendment's Equal Protection Clause.
the supreme court can declare laws unconstitutional
Declared unconstitutional by the supreme court
The Supreme Court gained the power to declare laws unconstitutional
They can appeal to the United States Supreme Court to have the law be declared unconstitutional by the Supreme Court's right to judicial review.
the supreme court can declare laws unconstitutional
the supreme court can declare laws unconstitutional