Things do not look good for any nominee that doesn't have full support of the majority party. In a position similar to Harriet Myers, Gen. Hayden is the nominee that faces a stiff struggle, this time.
There are two ways of looking at this.
One, the General can bring this agency back, using discipline and cleaning the hacks out. The CIA is no place for partisan bickering, agents and other employees need to leave politics out of the equation. The leaks for political purposes have severely compromised the effectiveness of this agency, at a time when we can least afford it.
The other is, there will be some people ( I, being one of them) that question the prudence of having a military man leading a civilian agency. There is something very big brotherish about this. It's not the person that I am concerned about, as I do not know much about Gen, Hayden, up to this point. But the precedent, is highly questionable, in my opinion.