The final debate between presidential candidates Governor George W Bush, and Vice-President Al Gore is scheduled to take place later tonight in St. Louis, but it could be postponed because of the death of Missouri Govenor Mel Carnahan. The race is close in nation-wide polls, and many battleground states are being inundated with political ads. In Minnesota, the national Republican Party recently began spending money on ads for Bush, and ads on behalf of Rod Grams in the Minnesota U.S. Senate race. The Minnesota GOP won't say how much money is being spent, only that it is "substantial." Steven Schier, chair of the political science department at Carleton College, speaks with MPR News.