Republicans criticized Granholm for dithering over her running mate selection while Posthumus moved deftly to name state Sen.

CNN: Granholm wins in Michigan

Cunning old Mr Posthumus has tried to depict Ms Granholm as slippery, shallow and more leftish than she appears.

ECONOMIST: A woman in Michigan shows there is life left in Clintonism

The Democratic nominee will be heavily favored this fall over Posthumus, a staunch conservative, who easily won the Republican nomination over state Sen.

CNN: Dingell survives Michigan primary

Granholm led Posthumus by 22 points in the latest independent poll.

CNN: Dingell survives Michigan primary

She led Posthumus, the Republican nominee, by double digits.

CNN: Granholm wins in Michigan