Iowa’s presidential caucuses have become, if anything, even more important now that Democrats have changed their 2008 primary schedule. That means more early visits to the Hawkeye State than in past cycles. This week, hopefuls Mark Warner, Joe Biden, and K-Lo endorsee Russ Feingold are all campaigning there. The news today is that Warner has shifted his Iraq-war position somewhat, endorsing a withdrawal of some troops but no fixed date at which U.S. armed forces will exit altogether. That’s also the left-of-center position of John Edwards, currently the strongest of the Dems in Iowa. Biden and Feingold are further left with the position that all troops should be withdrawn by a date certain, in Feingold’s case by next summer and in Biden’s case the end of 2007.

Yep, they are all debating when to retreat.