Should be close. My assumption is that Walker will presumably perform well in Midwestern states such as his home state, WI, IA, and OH. I just don't think he can win VA because of the plentiful voters from the DC suburbs. Since Obama's disapproval rate is up (52%) I think that the people will elect a GOP president.
Walker: 278
Clinton: 260
Popular vote:
Walker - 49.7%
Clinton - 48.3%
Closest races in order: WI (0.7%), OH (1.2%), VA (1.7%), FL (1.9%), CO (2.3%)
Walker ceiling, Clinton floor
343 / 195
Walker - 52.8%
Clinton - 47.2%
Clinton ceiling, Walker floor
347 / 191
Clinton - 53.3%
Walker - 46.7%
Clinton average
286 / 252
Clinton - 50.6%
Walker - 48.4%
Walker above average
273 / 265
Walker - 49.2%
Clinton - 48.8%