The Democratic Party in the U.S. has set the President up as an enemy and has for years been doing whatever they can to hamstring him in the conduct of war, not only in Iraq, but in Afghanistan and against terror in general. Should we fail in these, the Democrats surely get to take some credit for that.
Irresolution - The Congressional Democrats' misstep.
If Iraq is stabilized this side of chaos, the congressional Democrats will be remembered as the people who fought to prevent it, who tried to kneecap the commander and demoralize the armed forces, and all in all make the mission more difficult. If, on the other hand, the surge is seen to fail, they will be the ones who made it more difficult, demoralized the armed forces, kneecapped the commander, and telegraphed to the enemy that our will was cracking, and we would shortly be leaving.
The Democrats have also given Bush a partial alibi for a possible failure--he tried, but at a critical moment they threw in the towel. This argument would be plausible enough to attract support from a great many people. Had they let the surge play itself out, with best wishes but grave reservations, the Democrats could have gained a reputation for good will in any event, and for genuine prescience in the case of failure. But there is a difference between warning of failure and seeming to want it or cause it, and this is the line they have stumbled over. They have cut themselves off from all share in a victory, bought themselves a half-share in a loss, should one develop, and given the president they so despise an excuse he did not have before this. If a failure ensues, it is no longer his fault, in its entirety. Now it is his fault--and theirs.