McCain indicates US troops withdraw in 2 years

But the discussion on troop levels has shifted in recent days after Iraqi Prime Minister Nuri al-Maliki seemed to endorse Democratic presidential candidate Barack Obama's call for troops to be gone within 16 months of his taking office.

Obama met with Iraqi leaders in Baghdad on Monday, and an Iraqi government spokesman said Maliki told the Illinois senator conditions on the ground should dictate troop withdrawals.

After a meeting with former President George H.W. Bush, McCain was asked whether it was conceivable for U.S. troops to be fully pulled out of Iraq in about two years.

"I think they could be largely withdrawn," the Arizona senator replied, citing the success of the "surge" strategy of increasing U.S. troop levels in increasing security in the country.

"As I've said, we have succeeded. This strategy is not (just) succeeding, we have succeeded. And of course as we all know it has to be based on conditions on the ground."

McCain said U.S. military success had made it possible for troops to return. "When you win wars, troops come home. And we are winning," he said.

McCain spokesman Tucker Bounds said the senator's comments did not reflect a shift in position.

"The two years in his answer today is consistent with his position that we can begin to responsibly discuss the reduction of troop levels in Iraq as long as they are based on maintaining the security and stability of the gains we made," Bounds said.