>> reporter: election officials are bracing for lots of potential voting problems on tuesday, especiallily in the key battleground states n ohio, experts say because of confusion over new absentee ballot rules, more than 200,000 voters may be forced to cast provisional ballots that won't be counted until ten days after election day. >> there's a realistic chance that we will not know which candidate won the election in ohio. >> reporter: citizen groups like tea to vote, a tea party offshoot who says it's trained more than a million poll watchers to look out for voter fraud. liberal activist groups are saying they're employing their own poll watchers. >> we will be watching the poll watchers to make sure they are not acting as bullies. >> reporter: meanwhile hurricane sandy's devastation has swamped election plans in the northeast. officials are faced with flooded buildings and power outages are besieged. >> actually the timing of the storm was horrible for us respecting people's ability to get to the polls. >> reporter: this weekend the state announced it will let voters displaced by sandy