(CNN) - Sen. John McCain's campaign said Sunday that Barack Obama's remarks on Iraq "have left a significant question as to exactly what he intends."
"He has held almost every conceivable position in the course of his relatively brief career in the Senate," said Randy Scheunemann, McCain's foreign policy adviser.
Obama maintains his stance has not changed and said Saturday that "every single word" he says is closely measured.
McCain's campaign suggested Obama's views could be becoming more in line with McCain's Iraq policy.
"The position of [McCain's] campaign is that words do matter, and Sen. Obama's words have left a significant question as to exactly what he intends. If he is now joining Sen. McCain's position and saying that the need to maintain peace and stability in Iraq is a prerequisite before responsible withdrawal, which is Sen. McCain's position, we welcome his conversion to that position," Scheunemann said Sunday in a conference call with reporters.
The war over words started Thursday when Obama told reporters questioning his stance on Iraq that he will "continue to refine" his policies as warranted.
Obama denied any suggestion that he was shying away from his proposed 16-month phased withdrawal of all combat troops from Iraq, calling it "pure speculation" and adding that his "position has not changed."
National reporters and Republicans pounced on his comments. The Republican National Committee put out an e-mail statement saying that Obama was backing away from his position on withdrawal.
(CNN) - A roundup of quotes from the Sunday political talk shows, as compiled by the CNN Wire:
On the candidates' Iraq strategies:
"I think what's significant about what's happened in the last week - frankly, in the last month, since Senator Obama clinched the nomination - is how many big positions - Iraq, Iran, free trade, the death penalty - that Senator Obama has ... altered his position on.
"On Iraq, John McCain has been right and consistent, and Senator Obama has been wrong."
–Sen. Joe Lieberman, Independent from Connecticut, on ABC's "This Week"
"The Republicans, and John McCain specifically, are trying desperately to get away from the reality of John McCain's position, which is that he has a plan for staying in Iraq and Barack Obama has a plan for getting out of Iraq... (Obama's position) is no change whatsoever in his fundamental determination to end the war."
–Sen. John Kerry, D-Massachusetts, on CBS' "Face the Nation"
Watch as CNN's Paul Steinhauser takes a look at what's happening this week on the campaign trail.
WASHINGTON (CNN) - Sens. John McCain and Barack Obama have a busy week ahead as they court voters across the country.
Both candidates are making their pitch to a top Latino organization in Washington on Tuesday. This week also finds McCain pushing his plan to create new jobs. He'll be touting his proposal in some of the key battleground states.
Obama starts his week in two red states he hopes to turn blue - Georgia and North Carolina. Later in the week, he'll team up with Hillary Clinton for three fundraisers in New York, an Obama spokeswoman said.
Two of the fundraisers are aimed at raising money for Obama's Democratic presidential campaign, and one to try to retire the debt from Clinton's failed effort to win the nomination.