In Arizona's largest county the number of polling locations was cut by 85 percent from the 2008 primary and 70 percent from the 2012 primary during last month's presidential primaries.

“In Phoenix, a majority-minority city, County officials allocated one polling location for every 108,000 residents," the city's mayor Greg Stanton wrote in a letter to the Department of Justice calling for an investigation into the Republican-led effort to slash costs at the expense of voters. Voters in Maricopa County waited in line for hours.

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"The rations were far more favorable in predominantly Anglo communities: In Cave Creek/Carefree, there was one polling location for 8,500 residents; in Paradise Valley, one for every 13,000 residents; in Fountain Hills, one for 22,500 residents; and in Peoria, one for every 54,000 residents,” Stanton explained, suggesting that such racial disparities are a violation of the law.

Calling Arizona's election mess a "national disgrace," Democratic presidential candidate Bernie Sanders, who lost in the state by 12 points, echoed Mayor Stanton's call for a federal investigation shortly after the election. The Justice Department opened an investigation into Arizona's election on April 1.

Now, according to a new report from the Washington Post, rival Hillary Clinton's campaign is organizing various Democratic groups to file a lawsuit against the state in federal court on Friday. Clinton campaign elections lawyer Marc Elias will reportedly file suit on behalf of several Arizonians as well as the Democratic National Committee, the Democratic Senatorial Campaign Committee and the Arizona Democratic Party in Phoenix's U.S. District Court.

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Arizona’s “alarmingly inadequate number of voting centers resulted in severe, inexcusable burdens on voters county-wide, as well as the ultimate disenfranchisement of untold numbers of voters who were unable or unwilling to wait in intolerably long lines,” the lawsuit states.

“Arizona has a history of problems with guaranteeing the rights of their citizens to vote, and with this lawsuit we hope to stop it now in time for the 2016 general election,” Elias told the Post.

The lawsuit calls on the court to approve Maricopa County officials' polling location plans ahead of the general election in November to avoid the chaos from the primary election. It also calls for an end to onerous voting restrictions that have a “dramatic and disparate impact” on voters of color, who are disproportionately Democratic voters.

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While Clinton's election lawyer is organizing the affected parties in the lawsuit, the Clinton campaign will not officially join the suit until after it is filed in court, according to the Post.

The Clinton campaign is also suing North Carolina, Wisconsin, Virginia and Ohio over voting irregularities during their primary elections.

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Before the Supreme Court struck down the crucial pre-clearance component of the Voting Rights Act, Arizona’s election laws and practices had to be approved by the Justice Department, because of the state's racist history.