How US states mistakenly added 30,000 non-citizens to voter rolls

US states mistakenly added 30,000 non-citizens to voter rolls, revealing significant weaknesses within existing voter registration systems. Despite these errors, experts assert that the number of affected individuals is too small to impact elections when compared to the more than 170 million registered voters across the country. The cases serve as evidence of systemic vulnerabilities, yet the scale of the mistake is considered negligible relative to the total size of the US electorate during the voting process.