Most Iowa Republicans favor withdrawal from Iraq?

From the latest Strategic Vision poll of likely Iowa Republican caucus goers:

4. Do you favor a withdrawal of all United States military from Iraq within the next six months? (Republicans Only)
Yes 53%
No 37%
Undecided 10%

So 50 percent-plus Republicans out in Iowa think that we should completely pull out from Iraq in just six months? That's a pretty extraordinary number, and it is the second time SV has produced it. If this is true, what the hell are they doing supporting Giuliani, McCain, Romney, etc.? All of those candidates want us to stay in Iraq for years!

Is this a case of skewed results? Or do Republicans not know or don't care about their candidates' Iraq positions? If it is anything close to true, public discontent with the war must be enormous by comparison and Republicans won't have a prayer next year...