I have to say that I'm surprised by this. I always figured that Cuomo had political aspirations beyond Governor of NYS. Running for this office makes little sense if he does -- the Governors mansion is where political careers go to die. As Attorney General he has the ability to effect change -- whether that change is positive or not depends on your viewpoint but the ability is there. As Governor he will be held hostage by our corrupt Legislature and entrenched special interests. The electorate of course won't understand this -- all they'll remember is that he went to Albany promising to clean up the place and failed to deliver.
I suppose he could win in a landslide and take a mandate for reform to Albany that the Legislature would be unable to ignore but I rather doubt that will happen. Spitzer won 59 of 62 counties with 69% of the popular vote and still proved unable to change anything in Albany. It's hard to see Cuomo doing better at the ballot box or having the courage to take on the special interests, most of whom favor his party. From a political standpoint I think he's making a huge mistake here. Much better to stay where he is or try to knock off Gillibrand in a primary race.