The ensuing troop surge has helped deal a devastating blow to al Qaeda and has significantly enhanced security in Iraq. One strongly suspects that Churchill would applaud Bush for blowing off the defeatist recommendations of Baker and Hamilton and employing a strategy that offers the possibility of some form of victory.
I'd add: Bush also ignored the advice of the leaders of the Democratic party. Here's Harry Reid, from April: "This war is lost." He also ignored media elites like McClatchy reporter Tom Lasseter, who found some dispirited troops in February, and wrote an article titled, "Soldiers in Iraq view troop surge as lost cause."