The Cook Political Report rates each state's leaning in the Electoral College based upon a canvas of at least four top strategists for each party. Once rated a Toss Up, as of October 21, Missouri was rated a Likely Bush state.
Cook's U.S. electoral map

BUSH/CHENEY
7 Bush visits since March 3

Oct. 8-9 - BUSH: Debate and breakfast, St. Louis
Sept. 23-24 - CHENEY: Rallies, Warrenton and St. Joseph
Sept. 6-7 - BUSH: Toured several locations including Sedalia, Columbia

KERRY/EDWARDS
7 Kerry visits since March 3

Oct. 11 - EDWARDS: Rally, Kansas City
Oct. 8 - KERRY: Debate and rally, St. Louis
Sept. 10 - KERRY: Meeting with seniors, St. Louis