WATCH: GOP review finds no proof Arizona election was stolen from Trump

PHOENIX (AP) — A Republican-backed review of the 2020 presidential election in Arizona’s largest county ended Friday without producing proof to support former President Donald Trump’s false claims of a stolen election.

Watch the conference in the player above.

After six months of searching for evidence of fraud, the firm hired by Republican lawmakers issued a report that experts described as riddled with errors, bias and flawed methodology. Still, even that partisan review came up with a vote tally that would not have altered the outcome, finding that Biden won by 360 more votes than the official results certified last year.

The finding was an embarrassing end to a widely criticized, and at times bizarre, quest to prove allegations that election officials and courts have rejected. It has no bearing on the final, certified results. Previous reviews by nonpartisan professionals that followed state law have found no significant problem with the vote count in Maricopa County, home to Phoenix.

Still, for many critics, the conclusions reached by the firm Cyber Ninjas and presented at a hearing Friday, underscored the dangerous futility of the exercise, which has helped fuel skepticism about the validity of the 2020 election and spawned copycat audits nationwide.

“We haven’t learned anything new,” said Matt Masterson, a top U.S. election security official in the Trump administration. “What we have learned from all this is that the Ninjas were paid millions of dollars, politicians raised millions of dollars and Americans’ trust in democracy is lower.”

WATCH: How Arizona’s election review is providing a national playbook for disgruntled politicians

Other critics said the true purpose of the audit may have already succeeded. It spread complex allegations about ballot irregularities and software issues, fueling doubts about elections, said Adrian Fontes, a Democrat who oversaw the Maricopa County election office last year.

“They are trying to scare people into doubting the system is actually working,” he said. “That is their motive. They want to destroy public confidence in our systems.”

The review was authorized by the Republican-controlled state Senate, which subpoenaed the election records from Maricopa County and selected the inexperienced, pro-Trump auditors. On Friday, Senate President Karen Fann sent a letter to Republican Attorney General Mark Brnovich, urging him to investigate issues the report flagged. However, she noted the review found the official count matched the ballots.

“This is the most important and encouraging finding of the audit,” Fann wrote.

Trump issued statements Friday falsely claiming the results demonstrated “fraud.”

Despite being widely pilloried, the Arizona review has become a model that Trump supporters are pushing to replicate in other swing states where Biden won. Pennsylvania’s Democratic attorney general sued Thursday to block a GOP-issued subpoena for a wide array of election materials. In Wisconsin, a retired conservative state Supreme Court justice is leading a Republican-ordered investigation into the 2020 election, and this week threatened to subpoena election officials who don’t comply.

Announcement of interim findings from an audit of the 2020 election in Phoenix

Members of the Maricopa County election audit team wait to present their interim findings from a widely criticized audit of the 2020 election to the Senate President and Chair of the Senate Judiciary Committee, in Phoenix, Arizona, U.S., September 24, 2021. Photo by Mike Blake/REUTERS

None of the reviews can change Biden’s victory, which was certified by officials in each of the swing states he won and by Congress on Jan. 6 — after Trump’s supporters, fueled by the same false charges that generated the audits, stormed the U.S. Capitol to try to prevent certification of his loss.

The Arizona report claims a number of shortcomings in election procedures and suggested the final tally still could not be relied upon. Several were challenged by election experts, while members of the Republican-led county Board of Supervisors, which oversees elections, disputed claims on Twitter.

“Unfortunately, the report is also littered with errors & faulty conclusions about how Maricopa County conducted the 2020 General Election,” county officials tweeted.

Election officials say that’s because the review team is biased, ignored the detailed vote-counting procedures in Arizona law and had no experience in the complex field of election audits.

Two of the report’s recommendations stood out because they showed its authors misunderstood election procedures — that there should be paper ballot backups and that voting machines should not be connected to the internet. All Maricopa ballots are already paper, with machines only used to tabulate the votes, and those tabulators are not connected to the internet.

READ MORE: Arizona Senate GOP’s 2020 election report delayed due to COVID

The review also checked the names of voters against a commercial database, finding 23,344 reported moving before ballots went out in October. While the review suggests something improper, election officials note that voters like college students, those who own vacation homes or military members can move to temporary locations while still legally voting at the address where they are registered.

“A competent reviewer of an election would not make a claim like that,” said Trey Grayson, a former Republican secretary of state in Kentucky.

The election review was run by Cyber Ninjas CEO Doug Logan, whose firm has never conducted an election audit before. Logan previously worked with attorneys and Trump supporters trying to overturn the 2020 election and appeared in a film questioning the results of the contest while the ballot review was ongoing.

Logan and others involved with the review presented their findings to two Arizona senators Friday. It kicked off with Shiva Ayyadurai, a COVID-19 vaccine skeptic who claims to have invented email, presenting an analysis relying on “pattern recognition” that flagged purported anomalies in the way mail ballots were processed at the end of the election.

Maricopa County tweeted that the pattern was simply the election office following state law.

“’Anomaly’ seems to be another way of saying the Senate’s contractors don’t understand election processes,” the county posted during the testimony.

Announcement of interim findings from an audit of the 2020 election in Phoenix

People listen outside the Arizona Senate building to the announcement of interim findings from a widely criticized audit of the 2020 election in Phoenix, Arizona, U.S., September 24, 2021. Photo by Mike Blake/REUTERS

Logan followed up by acknowledging “the ballots that were provided for us to count … very accurately correlated with the official canvass.” He then continued to flag statistical discrepancies — including the voters who moved — that he said merited further investigation.

The review has a history of exploring outlandish conspiracy theories, dedicating time to checking for bamboo fibers on ballots to see if they were secretly shipped in from Asia. It’s also served as a content-generation machine for Trump’s effort to sow skepticism about his loss, pumping out misleading and out-of-context information that the former president circulates long after it’s been debunked.

In July, for example, Logan laid out a series of claims stemming from his misunderstanding of the election data he was analyzing, including that 74,000 mail ballots were recorded as received but not sent. Trump repeatedly amplified the claims. Logan had compared two databases that track different things.

Arizona’s Senate agreed to spend $150,000 on the review, plus security and facility costs. That pales in comparison to the nearly $5.7 million contributed as of late July by Trump allies.

Maricopa County’s official vote count was conducted in front of bipartisan observers, as were legally required audits meant to ensure voting machines work properly. A partial hand-count spot check found a perfect match.

Two extra post-election reviews by federally certified election experts also found no evidence that voting machines switched votes or were connected to the internet. The county Board of Supervisors commissioned the extraordinary reviews in an effort to prove to Trump backers that there were no problems.

Cassidy reported from Atlanta. Associated Press writers Jonathan J. Cooper in Phoenix and Nicholas Riccardi in Denver contributed.

Support PBS NewsHour: