World leaders: who'd win a fight?

I had this debate with my friends the other night, and I though I would what you dopers had to say.

Of the currently ruling world leaders, who do you think would win a fight? Ground rules: no weapons and they both see each other and know the fight is coming. I vote for Putin. He’s still youngish and is some sort of Judo blackbelt. Who can best him in hand to hand combat?

Arnold S. is trying to get a bill passed that will let him run for president.

Let’s wait on him before we try this out for real.