EPIC-MRA for Detroit Free Press (pdf)(8/21-23, likely voters, 6/12-15 in parentheses)
Virg Bernero (D): 29 (34)
Rick Snyder (R): 51 (49)
Undecided: 20 (17)
When Rick Snyder started looking, at the end, like he might win the GOP gubernatorial primary in Michigan, it raised an interesting question, given that Snyder was thoroughly dominant in pre-primary polls of the general election while the Dems were within striking distance of Peter Hoekstra and especially Mike Cox. Is it better to have a situation where, at the very worst, Michigan's governor is a relatively sane, pleasant guy (albeit, at the end of the day, a Republican), or a situation where there's a chance (though less than a 50% chance, given the nature of the year) of a Dem winning (but a greater than 50% chance of a truly odious creep being the next governor)? At any rate, once the dust settled on primary night, we were left with the former option, and now we're seeing Snyder even further dominating Dem nominee Virg Bernero in polling. (The best post-primary result for the Dems actually comes from Rasmussen.)
The favorables tell pretty much the whole story here: Bernero's "angry mayor" shtick doesn't seem to be wearing well (he's at 22/27), while Snyder's post-partisan positioning gives him a remarkable 48/12 standing. Bernero -- who over the weekend chose Southfield mayor Brenda Lawrence as his running mate, which should help a bit in terms of African-American support and presence in the Detroit area -- may improve his numbers as he gets better-known, but it may be too late for him to do much to define Snyder. With that in mind, Swing State Project is moving this race to "Lean Republican" from "Tossup."