Arizona Corporation Commissioner Bob Burns has crafted his re-election campaign on being a watchdog against outside money in elections.

More than 200 independent expenditure committees have filed with the Secretary of State’s Office but not all spend to the same degree. Here are this election’s five biggest spenders.

Of the $1.9 million spent this cycle by “outside groups” to affect Arizona elections, $565,000 – or about 30 percent – comes with no disclosure of the source of the money.

The Citizens Clean Elections Commission temporarily delayed its vote on a proposed rule that will clarify what constitutes a political committee under Arizona’s campaign finance statutes and possibly require disclosure from some dark money organizations due to last-minute changes that threw the commission’s meeting into confusion.

If GOP nominee Doug Ducey had shut down his campaign the day after the primary and hadn’t spent a dime since, Republicans still would have spent more than twice as much as Democrats on the Arizona governor’s race.

Moderate Republicans who supported Gov. Jan Brewer’s Medicaid expansion plan in 2013 are facing heavy fire from one political committee making independent expenditures against them.

Every law regulating ballot measure campaigns, political action committees and possibly even candidates’ campaign committees in Arizona may soon be wiped from the books, at least until the Legislature can write new ones.

Campaign cash may come pouring into some of Arizona’s top races next year thanks to a new law allowing candidates to raise far more money.

Critics say the bill will flood campaigns with more money and influence-buying, and that it may be the final nail in the coffin of Arizona’s voter-approved Clean Elections system.

Arizona was fairly giving this election season, kicking in at least $16 million to presidential candidates, according to the Federal Election Commission.

Rep. Adam Driggs, who is in a three-way Senate race for the Republican Party’s nomination in Legislative District 11, has received a huge boost from independent groups. But he's not the only one.