Ernie Fletcher - dunno, this is Al territory
Several reasons... the fact that there's an ongoing grand jury whatsit probe into his administration's hiring practices (with allegations of corruption, patronage, nepotism... you get the idea...) and the fact that several of his aides have been indicted along with some other officials in his administration and the Chair of the KY Republicans... can't have helped things, and neither has his response to the whole mess either (accusing Attorney General Stumbo of a witchunt/vendetta/conspiracy etc. against him)... but he was moderately unpopular before then.