From what I've read Malloy's numbers aren't good because he has taken some necessary but unpopular decisions, especially about the budget (similar situation with our government) .
Walker and the rest of the clowns saw their numbers dip because instead of governing they decided that it's a good time to enact a right wing ideological agenda and do things which they never mentioned on the campaign trail (eg. busting unions).
Not to mention corruption (Scott).
Malloy has neglected to fulfill campaign promises. He has been a let down.