Political spending by outside groups that are not required to disclose their donors is expected to explode during this presidential election year.

Congress could require more disclosure about who is financing campaigns, but it has made no move to do so.

Groups that advocate for more transparency say the federal stalemate has driven reform efforts to the states. California, Hawaii and Washington are among the states that are forcing more disclosure from outside special interests.

But there is a limit to what states can do because they don't have oversight of spending on federal races, such as presidential and congressional contests. Those are consistently the costliest elections.

(Story by: The Associated Press)

 

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