Sanders by 1% in a Caucasian state. Not good for him.
Missouri has significant black areas.
Right, but Missouri's White population is actually higher than, say, Michigan's, with less blacks than Michigan as well. Given the region and those demographics, he should be doing better.
Missouri non-Hispanic Whites (2014 update): 80.1%
Missouri African Americans (2014 update): 11.8%
Michigan non-Hispanic Whites (2014 update): 75.8%
Michigan African Americans (2014 update): 14.2%
Sources:
http://www.census.gov/quickfacts/table/PST045215/29
http://www.census.gov/quickfacts/table/PST045215/26
You're saying he should be doing better as if Michigan wasn't this huge upset that it was. Missouri is also 1/3 southern and southern whites are (as we've seen) more pro-Clinton.