A recent study by electionline.org, a nonpartisan research foundation, placed Missouri on a list of roughly a dozen states that have a high probability of encountering significant problems on Nov. 4.
Like the other states, Missouri has several possibly troublesome factors, including new voter identification laws, a heated race for a statewide office, a ballot packed with candidates and initiatives, and a highly charged, partisan atmosphere. Missouri has the added complication of being a swing state in the presidential race, with the candidates virtually tied.
Those factors, coupled with an unprecedented number of new voters and an expected record turnout, has led some political analysts to predict that Missouri could be at the center of "a perfect storm" that could throw the 2008 presidential election into disarray.
"Expecting a voting problem here is almost a no-brainer," said Dave Robertson, a political science professor at the University of Missouri at St. Louis. "We have a very good chance of extending the time it takes to count the vote" past midnight or later.
http://www.boston.com/news/politics/2008/articles/2008/10/27/missouri_ripe_for_voting_snags/