The bribery trial involving a state regulator, a congressional staffer and Johnson Utilities is set to begin in a couple of weeks and the potential witness list reads like a who's who of Arizona politics.

Congressman Andy Biggs, former Congressman Matt Salmon, and former Arizona Secretary of State Ken Bennett are among a list of 82 potential witnesses in a federal bribery trial set to begin on May 30.

[RELATED: Trial set for former Arizona regulator charged with bribery]

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Former corporation commissioner Gary Pierce and his wife Sherry are at the center of the scandal.

Pierce is accused of selling his vote in 2012 to George Johnson, owner of Johnson Utilities.

[ORIGINAL STORY: Ex-AZ Corp. Commissioner, owner of Johnson Utilities indicted on bribery charges]

In exchange, federal prosecutors said high-profile lobbyist Jim Norton then set up payments of cash and property between Johnson and the Pierces.

Bennett, who is now running for governor, said he was asked to be a character witness for Sherry, who also worked on Biggs' congressional staff.

[RELATED: Lobbyist's bid to cut allegations from indictment rejected]

Another high-profile politician on the list is disgraced lawmaker Don Shooter, who was kicked out of the state Legislature earlier this year following a sexual harassment investigation.

[READ MORE: AZ House votes to expel Rep. Don Shooter]

The trial could last as long as a month.

[SPECIAL SECTION: Arizona Politics]

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