The organization mobilized a get-out-the-vote effort to support Obama's presidential bid last year, but it was tainted when nearly a third of the 1.3 million voters the group registered were rejected.

Last week, authorities in Miami announced the arrests of 11 former registration canvassers on allegations that they had submitted nearly 200 falsified forms.

A preliminary hearing is scheduled for this month in Nevada, where state prosecutors have accused ACORN and two former top officials of using an illegal incentive system to motivate people registering voters just before the 2008 presidential election.