Reuters reports on the study from the Advancement Project and finds that the number of U.S. citizens affected by those laws could affect the outcome of the election.
The new laws include purges of people suspected of not being citizens in 16 states that unfairly target Latinos, the civil rights group Advancement Project said in the study to be formally released on Monday.
Laws in effect in one state and pending in two others require proof of citizenship for voter registration. That imposes onerous and sometimes expensive documentation requirements on voters, especially targeting naturalized American citizens, many of whom are Latino, the liberal group said.
Nine states have passed restrictive photo identification laws that impose costs in time and money for millions of Latinos who are citizens but do not yet have the required identification, it said.
Republican-led state legislatures have passed most of the new laws since the party won sweeping victories in state and local elections in 2010. They say the laws are meant to prevent voter fraud; critics say they are designed to reduce turnout among groups that typically back Democrats.