Here's a bit more info on this, from the Impeach Bush movement:

The criminal conduct of the Bush administration seems boundless. Having intimidated Congress into supporting his war of aggression against Iraq and the simultaneous assault on civil liberties at home, the Bush team is organizing a massive intimidation campaign against voters in predominantly African American communities in urban areas in Florida, Ohio, Pennsylvania and other swing states.

This effort - reminiscent of the disenfranchisement of voters that has been the ugly legacy of racism in this country - is plainly designed to steal the election.

"Republican Party officials in Ohio took formal steps yesterday to place thousands of recruits inside polling places on Election Day to challenge the qualifications of voters they suspect are not eligible to cast ballots," reports the NY Times of October 23.

"Election officials in other swing states, from Arizona to Wisconsin and Florida, say they are bracing for similar efforts by Republicans to challenge new voters at polling places, reflecting months of disputes over voting procedures and the anticipation of an election as close as the one in 2000.

"Ohio election officials said they had never seen so large a drive to prepare for Election Day challenges. They said they were scrambling yesterday to be ready for disruptions in the voting process as well as alarm and complaints among voters. Some officials said they worried that the challenges could discourage or even frighten others waiting to vote."