What I think he means is he looks around the UW History Department and sees half the department to the left of him and half to the right, but as it's a very liberal group, that doesn't make him a "centrist."
The blog he's starting at williamcronon.net promotes progressivestates.org, the Progressive States Network, a very liberal group with heavy union involvement.
See Ann Althouse, another UW professor with her own blog for a rebuttal.
Thank you x.
It was good to read Ann Althouse and the comments that followed.
Bump!