In The Godfather by M. Puso I come across the phrase 'all the horses'. Apparently, the horses themselves doesn't meantion there. The context is the following:
Sonny made a violent gesture. "I know I'm not the man he was. But I'll tell you this and he'll tell you too. When it comes to real action I can operate as good as anybody, short-range. Sollozzo knows that ad so do Clemenza and Tessio, I 'made my bones' when I was nineteen, the last time the Family had a war, and I was a big help to the old man. So I'm not worried now. And our family has all the horses in a deal like this.
Could you explain the meaning of the entire sentence?