PHOENIX - The U.S. House Committee on Oversight and Reform will hold a hearing Thursday about Arizona's partisan election review, but a key figure declined an invitation to testify.

Doug Logan, CEO of Cyber Ninjas, the lead contractor hired by state Senate Republican leaders for the divisive review of Maricopa County's 2020 election, told the oversight committee this week he wouldn't appear at the hearing. He was invited in a letter dated Sept. 23.

"Mr. Logan informed the committee less than two days before the hearing that he was unwilling to testify, declining the opportunity to defend his company's highly questionable, partisan audit under oath," the committee said in a press release Wednesday.

The hearing, titled "Assessing the Election 'Audit' in Arizona and Threats to American Democracy," starts at 7 a.m. Arizona time and will be livestreamed. The committee said the purpose is "to assess the election 'audit' in Maricopa County, Arizona, conducted by Cyber Ninjas, Inc., and how this and similar audits undermine public confidence in elections and threaten our democracy."

The witness list has five names other than Logan, including Shiva Ayyadurai, a member of the audit team that released its findings Sept. 24.

Also set to testify are two Republican members of the Maricopa County Board of Supervisors who opposed the state Senate's review, Chairman Jack Sellers and Vice Chairman Bill Gates.

David Becker, executive director and founder of the Center for Election Innovation and Research, and Gowri Ramachandran, senior counsel for the Brennan Center for Justice, round out the list.

"The hearing will examine how, despite failing to find any fraud, Cyber Ninjas' audit has already inflicted grave damage to our democracy," the committee said.

"The audit has threatened the integrity of Arizona's elections, inspired similar hyper-partisan audits in other states, and been used to justify dangerous state election subversion laws."

The oversight committee is chaired by Democratic Rep. Carolyn Maloney of New York and has two members from Arizona, Republican Reps. Paul Gosar and Andy Biggs.

On July 14, the committee sent Logan a letter requesting information about Cyber Ninjas’ role in the review process and how it was being funded.

That letter noted that the committee "is the principal oversight committee of the House of Representatives and has broad authority to investigate 'any matter' at 'any time' under House Rule X."