I see parallels to Obama's negotiating abilities...
The object of the game is to use one's stones to surround a larger portion of the board than the opponent. Now one of the surest ways to lose is to defend against each and every threat. Your opponent attacks one of your holdings and you defend, but in defending one tends to lose territory as the borders are more firmly determined. If all you ever do is defend, then all you will accomplish is to lose territory that you had staked out in the early part of the game. Instead the skilled player will often respond to an attack with an attack of his own. Then the opponent has to determine if he has more to gain by continuing the attack or more to lose by ignoring the new threat. Essentially the game becomes a negotiation and a test of each player's skill in reading the board for threats.