Jurisdictions once monitored by the justice department for racially discriminatory voting practices have collectively closed more than 1,000 polling places since a watershed 2013 US supreme court ruling released the jurisdictions from oversight, according to a new watchdog report. In 757 counties and county equivalents that formerly had to pre-clear voting practice changes with Washington, 1,173 polling places disappeared between 2014 and 2018, a study by the Leadership Conference Education Fund, part of the nation's oldest and largest civil rights coalition, found. The closures could disproportionately disenfranchise voters of color, especially when combined with restrictive voter ID laws, gerrymandering and aggressive voter roll purges, the report warned. Last month, a separate study found that US election jurisdictions with histories of egregious voter discrimination have been purging voter rolls at a rate 40% beyond the national average. "Closing polling places has a cascading effect, leading to long lines at other polling places, transportation hurdles, denial of language assistance and other forms of in-person help, and mass confusion about where eligible voters may cast their ballot," the report said. "For many people, and particularly for voters of color, older voters, rural voters and voters with disabilities, these burdens make it harder - and sometimes impossible - to vote."