The Pittsburgh Tribune-Review has a comprehensive story in today's edition detailing suspected voter fraud tied the left-wing advocacy group ACORN in at least nine states including Pennsylvania. ACORN is working with the Obama campaign to register voters.

From the article by staff writer Matthew Santoni:

Employees of the Association of Community Organizations for Reform Now, commonly known as ACORN, are under investigation in Indiana, Michigan, Missouri, Nevada, New Mexico, North Carolina, Ohio, Pennsylvania and Wisconsin since local election officials started noticing irregularities among the thousands of registrations submitted by ACORN.

The ACORN organizer in one state said the organization had no way of checking all registrations.

Officials in Missouri, a hard-fought jewel in the presidential race, are sifting through possibly hundreds of questionable or duplicate voter-registration forms.

Charlene Davis, co-director of the election board in Jackson County, where Kansas City is, said the fraudulent registration from ACORN were bogging down work Wednesday, the final day Missourians could register to vote.

"I don't even know the entire scope of it because registrations are coming in so heavy," Davis said. "We have identified about 100 duplicates, and probably 280 addresses that don't exist, people who have driver's license numbers that won't verify or Social Security numbers that won't verify. Some have no address at all."

Read the full story at the newspaper's Web site.