Guy Cecil, the executive director of the Democratic Senatorial Campaign Committee (DSCC), has accused Republican candidates in three battleground states of using dirty tricks to confuse voters.

Brian Walsh, communications director of the National Republican Senatorial Committee, dismissed Cecil's charges as baseless.

“These allegations are so silly and so ridiculous they don’t even merit a serious response,” he said.

Cecil said Democrats are looking forward to a Justice Department or FBI investigation in Arizona after Rep. Jeff FlakeJeffrey (Jeff) Lane FlakeOvernight Health Care: House passes .3T omnibus | Bill boosts funds for NIH, opioid treatment | Senators spar over ObamaCare fix | 'Right to Try' bill heads to the Senate The Hill's 12:30 Report Booker admits defeat in Capitol snowball fight with Flake MORE (R), who is running to replace Sen. Jon Kyl (R), conceded that his campaign might have given voters inaccurate information about polling locations through robo-calls.

Democratic state party officials have asked the FBI to investigate.

Flake told reporters Tuesday that his campaign erred by including incorrect information in some 10 to 15 calls.

"It sometimes happens in a big campaign that we get a few addresses wrong," Flake said, according to a report by Scripps Media.

Cecil, speaking to reporters at the Liaison hotel in Washington, also blasted Linda McMahon, the Republican Senate nominee in Connecticut, of “cloaking” her campaign operatives to pose as labor officials at polling places. The Service Employees International Union alleged Tuesday that McMahon supporters were posing as members of the union by wearing purple shirts and urging voters to vote for McMahon.

Cecil also accused Rep. Denny Rehberg’s (R-Mont.) campaign of running “illegal” robo-calls.

“Jeff Flake was sending out robo-calls to Democrats, giving them the wrong polling location. Their campaign has admitted to doing it. They say it was a mistake. We’ll let the FBI, the Justice Department determine whether or not that was true or not,” Cecil said.

“We’ve also had a number of other issues with Republicans working to suppress the vote. If you look at what’s happening in Montana, first of all, with the Rehberg campaign running illegal auto-calls in that state,” he said.

Cecil said McMahon, “in an act of desperation, has been cloaking herself as a Democrat with voters in key base precincts for our party.”

Cecil said there have been long lines at polling places around the country, where voters have had to wait between two and six hours to vote in some precincts.

“Long lines, we’ve certainly seen [at] a number of precincts around the country. Two-, three-, four-, five-, six-hour lines, not enough voting machines but, frankly, nothing systemic,” he said.

The DSCC has been working with “thousands” of lawyers around the country devoted specifically to Senate races who have been working with local elected officials and secretaries of state to resolve problems. 

Updated at 10:14 p.m.