What factors set voter qualifications for all 50 states?

Voter qualifications in all 50 states are primarily set by state laws, which must comply with federal regulations. Key factors include age (typically 18 years or older), citizenship (must be a U.S. citizen), and residency (must reside in the state where they intend to vote). Additionally, states may impose restrictions based on felony convictions or mental competency. These qualifications can vary significantly from one state to another, reflecting local legislative priorities and values.