LAS VEGAS -- There have been no official reports of voting irregularities Tuesday in Nevada, according to an official in the Secretary of State's Elections Division.

Rumors persist in southern Nevada of voting machines pre-programmed with Sen. Harry Reid's (D) name selected, the official said. But no voters who experienced that directly have come forward to file a complaint.

An official in the Clark County Election Department also said they've received no reports of voting irregularities. Clark County, which has the state's largest population, is home to Las Vegas.

Earlier Tuesday, the National Republican Senatorial Committee circulated a report by the conservative magazine National Review, which said Harrah’s executives pushed company employees to vote early to benefit Reid. The NRSC said the tactics were "heavy-handed."

But Nevada Democrats said there was nothing amiss with asking unionized casino workers to get to the polls for Reid.

"Get out the vote is not strong-arming voters," Sam Lieberman, chairman of the Nevada State Democratic Party, told The Ballot Box. "The unions have been engaged with Harry Reid and the Democratic Party for decades."

Conservatives and Tea Party groups have spent weeks warning voters about the potential for fraud on Election Day. Radio host Laura Ingraham told her listeners on Monday to be vigilant against voter fraud perpetrated by Democrats.

Should irregularities arise, or the margin of victory be close, Reid and Republican Sharron Angle can demand a recount. The only stipulations, according to the Secretary of State's Elections Division, is that the candidate pay for it, the recount must be of no less than 3 percent and no more than 5 percent of precincts, and it must be demanded within three business days of the certification of the results, which will happen on Nov. 23. Officials must complete the recount within five working days.

The last Senate election recount was Reid's race against Republican John Ensign, which the Democrat won by 428 votes. That recount cost Ensign about $56,000, according to election officials.