Despite what the pundits will say, I fear the testimony of Gen. David Petraeus and Ambassador Ryan Crocker on the Hill Monday and Tuesday is not a turning point, does not give Bush breathing room, and is largely irrelevant.
To any extent that what they do in Iraq ends up making a real positive difference, Petraeus and Crocker will likely be doing the Democrats a big favor, not Bush, who won't be in office much longer.
The central question is whether the Democrats can force a significant reduction of troops from Iraq on Bush's watch, so as to avoid Iraq becoming exclusively their headache when they (as is likely) take over the White House in January of 2009. If they could, this drawdown would be the best option. Certainly, that is what a majority of Iraqis thinks, according to the new BBC/ABC poll.
But the answer is: No. The Democrats cannot get the troops out of Iraq because they cannot overturn a Bush veto in the House of Representatives, and because they cannot overcome the need for a consensus of 60 senators in the Senate. Some Democrats, such as Joe Lieberman, oppose a rapid withdrawal. And the likelihood that 11 Republican senators will suddenly become withdrawalniks between now and November, 2008, is negligible.