Voter ID laws in the United States

Voter ID laws in the United States are laws that require a person to provide some form of official identification before they are permitted to register to vote, receive a ballot for an election, or to actually vote.

At the federal level, the Help America Vote Act of 2002 requires voter ID for all new voters in federal elections who registered by mail and who did not provide a driver's license number or the last four digits of a Social Security number that was matched against government records. Though state laws requiring some sort of identification at voting polls go back to 1950, no state required a voter to produce a government-issued photo ID as a condition for voting before the 2006 election. Indiana in 2006 became the first state to enact a strict photo ID law, a law that was upheld two years later by the U.S. Supreme Court. As of September 2016, 33 states have enacted some form of voter ID requirement. Lawsuits have been filed against many of the voter ID requirements on the basis that they are discriminatory with an intent to reduce voting by traditionally Democratic constituencies. Parts of voter ID laws in several states have been overturned by courts.

Proponents of voter ID laws argue that they reduce electoral fraud while placing only little burden on voters. Opponents argue that electoral fraud is extremely rare in the United States and has been magnified as an issue to create barriers to voter registration, and that requiring voter ID in effect discriminates against minority groups and those who are less likely to possess photo IDs. Critics have argued that the barriers could result in the disenfranchisement of black, Hispanic and other minority voters.

Research has shown that the type of voter fraud that would be prevented by voter IDs is extremely rare; research is mixed as to whether voter ID laws reduce overall turnout or minority turnout; and research has shown that Republican legislators in swing states and districts with sizable black or Hispanic populations push the hardest for voter ID laws.

There is no empirical evidence that voter fraud occurs often enough to have any plausible impact on elections. One study, commonly cited by President Trump and other Republicans, purported to show that non-citizens vote in large numbers in the United States, but the findings of the study were later shown to be driven by measurement error and has been comprehensively rebutted. The authors of the study have conceded that measurement error "may have biased our numbers", and have also rebuked President Trump for claiming that millions voted illegally in 2016.

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