An activist organization on Tuesday defended its voter registration practices amid new allegations of voter fraud and a call from Republican lawmakers to investigate irregularities.
In Ohio, Democrat Barack Obama said the GOP shouldn't use the group's registration problems as an excuse to keep voters from turning out on Election Day, Nov. 4.
The Association of Community Organizations for Reform Now, known as ACORN, has registered 1.3 million young people, minorities and poor and working-class voters, the group says.
Some of those registration cards have become the focus of fraud investigations in Nevada, Connecticut, Missouri and at least five other states. Election officials in Ohio and North Carolina also recently questioned the group's voter forms.
More than 13,000 workers in 21 states recruited less-fortunate voters, who tend to be Democrats.
"The vast, vast majority were dedicated workers," ACORN spokesman Kevin Whelan said at a news conference. "They did something remarkable in bringing all these new voters."
On Monday, election officials in Ohio's most populous county asked a prosecutor to investigate multiple registrations by four people who signed up through ACORN. One voter said he signed 73 voter registration forms during a five-month period.
The North Carolina State Board of Elections is reviewing suspect voter forms from at least two counties.
Meanwhile, House Republicans also have renewed their push for a Justice Department investigation of ACORN. On Friday, six GOP leaders wrote to Attorney General Michael Mukasey to urge him to make sure ballots by ineligible or fraudulent voters are not counted on Nov. 4.
A law enforcement official said ACORN has been on the radar of federal investigators. But the official would not say whether an investigation has been opened, and spoke on condition of anonymity because of the sensitivity of the issue so close to the election.
Whelan said ACORN staffers separate applications with missing or false information and flag them for election officials. All applications, including problematic cards, are handed in because some state laws require it, he said.
Whelan said he did not know how many registration cards had problems but believed it was a small percentage. He was unsure how many workers were fired for purposely turning in duplicate applications or those with fake information, he said.
"If they look false, we identify them as such," Whelan said of the forms.
ACORN has been drawn into a back-and-forth between the presidential campaigns.
Republican John McCain's campaign on Tuesday said Obama should rein in ACORN's efforts in order to fight voter fraud. The campaign accuses the Democratic presidential candidate of having close ties to the group.
"Obama has a responsibility to rein in ACORN and prove that he's willing to fight voter fraud," McCain's running mate, Alaska Gov. Sarah Palin, said Tuesday in an interview with conservative radio host Rush Limbaugh.
Obama and two other lawyers represented ACORN in 1995 in a lawsuit against the state of Illinois to make voter registration easier. During this year's primary, Obama hired a firm with ties to the group for a massive get-out-the-vote effort.
Obama told reporters on Tuesday that ACORN was not advising his campaign on voter registration.
Last week, McCain called for a federal investigation of the organization during a campaign rally. His campaign manager, Rick Davis, has said Obama's connection to the activist group should be investigated.
"This is another one of those distractions that get stirred up during the campaign," Obama said.