Election Day was tainted by complaints of dirty tricks that led to FBI investigations in at least two states, with some voters reporting intimidating phone calls, misleading sample ballots, and even an armed man outside a polling place.

In Virginia, the FBI was looking at complaints of an apparently orchestrated series of phone calls in the hard-fought U.S. Senate race between Senator Allen, a Republican, and Democrat Jim Webb. Some voters reported they got calls telling them to stay home on Election Day, or face criminal charges.

The liberal voter group MoveOn offered a $250,000 reward for information leading to a conviction for voter interference, which is a federal crime.

In Indiana, the FBI was investigating allegations that a Democratic volunteer at a polling site in the college town of Bloomington was found with absentee ballots after counting had begun.

Other states reported similar problems.

In Arizona, three men, one of them armed, stopped Hispanic voters and questioned them outside a Tucson polling place, according to voting monitors for the Mexican American Legal Defense and Educational Fund, which photographed the incidents and reported them to the FBI.

In Maryland, sample ballots suggesting Republican Gov. Robert L. Ehrlich and Senate candidate Michael Steele were Democrats were handed out by people bused in from out of state. Democrats outnumber Republicans in Maryland by nearly 2-to-1.

An Ehrlich spokeswoman said the fliers were meant to show the candidates had the support of some state Democrats. They were paid for by the campaigns of Ehrlich, Steel and the GOP. Some of the fliers include pictures of Ehrlich with Democrat Kweisi Mfume, a former NAACP president.

More than 80% of the nation’s voters were expected to cast some type of electronic ballot Tuesday, which was the deadline for major reforms mandated by the federal Help America Vote Act, passed by Congress to prevent a rerun of the 2000 election debacle.

Across the country, Democrats accused Republicans of sponsoring automated “robo-calls” that have infuriated voters. The recorded calls, which reached a fever pitch in the days leading up to the election, automatically dial and re-redial, promoting or trashing a candidate.

Republicans have denied responsibility. Some voters have reported being awakened in the middle of the night by such calls, and said that after they hung up, the phone rang again. Federal rules bar election phone solicitations after 9 p.m.

In some states, the effort to improve the integrity of the election system got off to a shaky start. Long lines formed, prompting appeals to judges to keep the polls open longer.

Kevin Caffrey, a 43-year-old school teacher from Denver and a registered Republican, was furious after he was forced to stand in line for more than an hour.

“Every individual who put me in line, I’m voting against them. I’ve been waiting in line like an animal. This is a nightmare,” he said.

In Denver, up to 300 people stood outside some polling sites. One was Democratic gubernatorial candidate Bill Ritter, who waited an hour and 40 minutes.

“It’s actually heartening,” he said. It means people “understand the process is important enough to be patient and wait in line.” Nonetheless, Democratic Party officials asked a judge to extend poll hours because of the delays.