A supporter of the Democrat running against Maricopa County Sheriff Joe Arpaio has filed a complaint accusing the Republican sheriff of failing to fully disclose where he spends the more than $8 million he has raised in this election cycle. The complaint also alleges the sheriff violated county rules by appearing in his uniform in campaign commercials.

But Arizona campaign-finance laws do not require candidates to list every vendor they use during the course of an election, said Joseph A. Kanefield, a former assistant attorney general who is now a partner with Ballard Spahr.

Said Mr. Kanefield: “I’m not sure what’s to be gained by learning about how all this money is spent. I guess if you want to know which particular printer printed the fliers, you’re not getting that. But they are reporting what they’re spending, and they’re describing what they’re getting (in return).”