The legal fight against a 2014 Arizona law that critics have said suppresses voter initiatives will have to wait.

The law requires petitioners, who specifically gather signatures for voter initiatives, to register with the Arizona Secretary of State's Office if they're paid or from out of state.

More importantly, the law requires the petitioner show up in court if subpoenaed. And failure to do so disqualifies all their signatures.

Authors of the law claim it prevents voter fraud. Opponents call it an illegal hurdle designed to prevent public mandates. It has succeeded in stopping several recent petition drives - including an effort to ban "dark money."

On Tuesday, the lead attorney opposing the law withdrew her challenge. Having failed to get a preliminary injunction, and with the amount of time and money sunk into the effort, she said it did not make sense to proceed at this time.