From the Senator's site:

It has come to our attention from an audit of 2.1 million ballots in Arizona complemented by an in-depth canvass of votes in Arizona, as well as through multiple different data reviews of voting by independent experts; that our representative republic suffered a corrupted 2020 election.

Fraud and inaccuracies have already been shown through multiple audits and canvasses in multiple states, as well as through lawsuits challenging the validity of election results in several counties in multiple states.

If results from these measures prove an inaccurate election was held, as has been shown in Arizona, and is being shown in many other states; then it is clear that certification of many electors was improperly rendered in January 2021 of the November 2020 United States presidential election.