Several allegations of voting problems have popped up across the nation, which are arguably benefiting Democratic presidential candidate Hillary Clinton's campaign.

Four states have specifically shown irregularities in their primaries, with allegations of voter suppression, rule-bending and inaccurate accounting of votes for Democratic candidates.

Clinton has benefited in each, The Huffington Post reports.

In Iowa, Clinton was declared the winner of the caucuses by 0.2 percent. A requested audit of the results was refused, even though there were reports of “inconsistent counts, untrained and overwhelmed volunteers, confused voters, cramped precinct locations, and a lack of voter registration forms,” according to The Des Moines Register.

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Results from 90 precincts were reported missing, so the Democratic Party reportedly re-staged their results.

Additionally, in a video posted to C-SPAN, a Clinton precinct captain in Polk County, Iowa, allegedly “did not conduct an actual count of Clinton supporters and deliberately mislead the caucus,” The Huffington Post reports.

The campaign of fellow Democratic presidential candidate Sen. Bernie Sanders of Vermont asked to review the caucuses results but the Democratic Party refused his request.

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In Massachusetts, former President Bill Clinton, Hillary Clinton’s husband, has been accused of electioneering near polling stations, which is against the law.

Bill “blocked off several polling entrances, preventing people from voting. In New Bedford, a Reddit user posted a video depicting the former president speaking from a megaphone. Voters were roped off and could not enter their polling places,” reports claim.

Under Massachusetts law, it is illegal to campaign within 150 feet of a polling station.

Massachusetts’ Secretary of State William F. Galvin told the Clinton campaign about the rule, and reminded election workers that the former president could not go inside a polling place and approach voters -- he still did.

Clinton was named the winner in Arizona with less than 1 percent of votes tabulated and at least hundreds, if not thousands, of voters still waiting in line to vote. The reason for the long lines was due to a lack of polling places. In 2012, Maricopa County -- which has the majority of the state’s registered Democrats -- had 200 polling places. For this year’s primary, it had only 60 for an estimated 800,000 registered voters.

In 2008, 113,807 Democrats voted in the state’s primary. This year only 32,949 did. The substantial drop in participation means tens of thousands of voters may have been prevented from casting their ballots.

Many Arizona voters also arrived at the polls to discover they had somehow been registered as Independents, Republicans or without a party affiliation. This mishandling error made them ineligible to vote in the Democratic primary.

Arizona claims a computer glitch is to blame.

The April 19 New York primary was also plagued with accusations of voter suppression.

The state’s voters encountered broken voting machines, missing ballots and purged voter registrations, RT reports.

A total of 562 complaints were received by phone at New York State Attorney General Eric Schneiderman’s office between 6 a.m. and 3:50 p.m. on voting day, plus 140 complaints via email. Residents also took to social media and used the hashtag #VoterSuppression to share their experiences.

“This is by far the largest volume of complaints we have received for an election since Attorney General Schneiderman took office in 2011,” department spokesman Nick Benson said.​

Under New York's closed primary rules, independent voters are barred from casting a vote for a Democratic or Republican candidate.

Clinton won the New York primary.

Sources: The Huffington Post, The Des Moines Register, RT / Photo credit: Nathaniel F/Flickr