Few businessmen are capable of being in politics, they don't understand the democratic process, they have neither the tolerance or the depth it takes. Democracy isn't a business.
It is not always by plugging away at a difficulty and sticking to it that one overcomes it; often it is by working on the one next to it. Some things and some people have to be approached obliquely, at an angle.
I make no conscious effort to be tough, or hard-boiled, or grim, or any of the things I am usually called.