These couple exerpts caught my eye:

Arizona is a state with the unusual situation of bifurcated elections, in which residents who provide proof of U.S. citizenship can vote in all elections while the others may vote only in federal elections, resulting in ballots cast by voters who haven’t proven their U.S. citizenship. State law requires residents registering to vote in the state to provide proof of U.S. citizenship.

However, after the U.S. Supreme Court ruled in 2013 that Arizona must accept U.S. voter registration forms because of federal requirements under the 1993 National Voter Registration Act, the state allows residents registering to vote who don't provide proof of citizenship to receive ballots for federal races only.

Sounds like an Act that needs revisiting.

From AI:

The National Voter Registration Act of 1993, also known as the "Motor Voter Act," is a federal law that aims to increase voter registration and turnout in the United States. The Act requires states to offer voter registration opportunities at motor vehicle agencies, public assistance agencies, and by mail. It also prohibits states from removing registered voters from the rolls unless they have died, moved, or failed to vote in two consecutive federal elections. The Act has been criticized by some for allegedly increasing the potential for voter fraud, while others argue that it has made voting more accessible for eligible citizens.