State officials call the changes mundane, while others say they hurt minorities and their ability to vote.
Republicans appointed a majority of the justices, but these days the court gets little love from the right.
The cases the justices hear next term could cause great division.
The court will consider whether workers’ rights are violated when they are compelled to pay unions.
Lawyers opposed to affirmative action say a lower court had ignored the justices’ instructions.
The court voted 5 to 4 to halt further implementation of the Mercury and Air Toxics Standards rule.
The case arose after Arizona voters opposed to congressional gerrymandering had taken the power away from state legislators.
The justices were considering a challenge brought by death-row inmates in Oklahoma.
It took decades for same-sex marriage to become a right, and five episodes along the way exemplify an uneven history largely marked by legal victories and often shadowed by political setbacks.
Some Supreme Court justices likened a lethal-injection drug to burning at the stake. Others said drug opponents were waging a “guerrilla war” on execution.