Obama took questions Saturday after canvassing door to door in Des Moines.
DES MOINES, Iowa (CNN) - Sen. Barack Obama, D-Illinois, said Saturday that he and Sen. Hillary Clinton, D-New York, differ on a "range of issues." Specifically, he said Clinton thinks "more conventionally" on the international scale.
"On foreign policy I think that she tends to think more conventionally, at a time when we're facing a series of unconventional threats," the Illinois senator said.
Speaking to reporters in Des Moines, Obama implied that Clinton may be more willing to "go along with Bush policies that could provide a rationale for keeping troops in Iraq longer or engaging in aggression towards Iran."
He also said the two differ in how aggressive they are in direct diplomacy and the kinds of messages they're sending to the world with respect Iraq, but he admitted that "there is overlap in terms of our positions on healthcare or some other issues."
When asked if he felt the campaign could be getting ugly, Obama responded by saying his campaign is not undergoing any fundamental transformation in their approach.
"We continue to offer a hopeful and optimistic message about where we want to take the country," Obama said. "Obviously there are going to be differences between the candidates...and the voters are going to need to know where those differences are."
"None of these differences I think rise to the level of personal attacks or gratuitous attacks, and that's the kind of politics I think people are tired of."
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-CNN Iowa Producer Chris Welch