The Supreme Court case that could reshape US elections

The U.S. Supreme Court in its upcoming term will consider a case that could radically reshape how presidential and congressional elections are run in America.

The case, Moore v. Harper, centers on the controversial “independent state legislature” theory, which holds that a literal reading of the U.S. Constitution gives state legislatures the final say in regulating votes for federal office, unchecked by governors, state courts, or provisions in state constitutions.

If approved by a Supreme Court majority, the most extreme reading of this theory could upend how many states draw...