MSNBC.COM - With more than 90 million Americans expected to cast their ballots on Tuesday, election officials across the country are bracing for what some fear will be a "perfect storm" of election day problems that could result in tense confrontations at polling stations and a rush to the courthouse to file legal challenges.
The list of actual and potential problems is unusually long this year, ranging from concerns about machine failures to confusion over new rules governing voter ID and provisional ballots.
Another big wild card: the impact of groups such as "True the Vote," a Tea Party off-shoot, that is vowing to swarm polling places with an army of hundreds of thousands of "citizen" poll watchers to look for fraud and challenge ineligible voters.
It's a threat that civil rights groups are vowing to fight with their own rival armies of poll watchers -- to "monitor the monitors," says one activist. click here to read more