No, because it's really entirely unrelated. Legislators are not experienced to be President.
Although I think that executive experience is important, I think that you're underrating legislative experience. Having experience with foreign leaders and with foreign affairs, the national media, connections in congress and with national figures, and more experience with national issues all seem pretty important to me. And it's not as if a congressman does no leading at all, as they have to lead their own staffs and committees.
Although I'd take a generic governor over a generic congressman, I would definitely take a generic congressman over a generic businessman.
