Rasmussen has a poll out showing Cuomo trouncing Lazio and Paladino, but they also include this note about when their telephone survey was conducted:

The survey was taken just after a New York Times report detailing how Cuomo has received large campaign contributions from special interest groups whose influence he has previously criticized and vowed to curb. But most New York voters are not following the story, although 59% describe Cuomo’s campaign contributors as at least somewhat important in terms of how they will vote in November. That includes just 22% who say it is Very Important.