... If they're young and college-educated, anyway. The Chicago Tribune has a pretty good piece on the political leanings of Goshen College students, which mainly focuses on increasing Mennonite willingness to participate in politics at all, but also addresses Goshenites' preference for Barack Obama.
I think there's an actual trend here. In the last primaries in states with historical Mennonite population centers, Indiana and Pennsylvania, Obama lost everywhere but big cities -- and the Mennonite-heavy counties. Seriously. Check out the county-by-county results for Indiana, and Pennsylvania - both Elkhart County, Indiana (home to Goshen College) and good ol' Lancaster County are in the Obama column.