Florida can't enforce a controversial new law targeting undocumented immigrants entering Florida, the Supreme Court said on July 9.

The law, enacted this year, made it a crime for unauthorized migrants to enter the state. Challengers say immigration is a federal matter.

The state of Florida cannot enforce a controversial new law aimed at preventing undocumented immigrants from entering the state, the U.S. Supreme Court said Wednesday.Why it matters: The high court's rejection of the state's emergency appeal leaves in place a lower court's decision to pause the law while legal challenges continue.