A judge has blocked Pennsylvania's controversial voter identification law that would have enforced stricter ID requirements for Election Day.

Commonwealth Court Judge Robert Simpson ordered Pennsylvania officials not to enforce the new law in the upcoming presidential election, citing concern that all voters wouldn't be able to get the necessary identification by Nov. 6.

Simpson's decision will still allow the law to go into effect next year, unless he decides later to make Tuesday's ruling permanent.

The law will require voters to show a valid photo ID when heading to the polls.

Many Democrats oppose the law, saying it would limit voter turnout and benefit Republicans. But others say it's necessary to prevent voter fraud.

Judge Simpson's decision can be appealed to the state Supreme Court.