CNN: OBAMA: STABILITY ULTIMATELY IN HANDS OF IRAQIS

NEW: Sen. Barack Obama: Iraq political progress needed to match security success

Obama set to meet with king in Amman, Jordan

Jordan is U.S. ally that has received Iraqi war refugees

Senators stop off in Iraq's Sunni-dominated Anbar province before Jordan

SOURCE: http://tinyurl.com/5hwrcd

(CNN) -- Sen. Barack Obama said Tuesday he was pleased with the reduction of violence in Iraq since the deployment of more U.S. troops, but added it was a result of several factors, not just the "surge."

"We don't know what would have happened if the plan that I preferred in January 2007 -- to put more pressure on the Iraqis to arrive at a political reconciliation, to begin a phased withdrawal -- what would have happened had we pursued that strategy," Obama said after landing in Amman, Jordan.

"I am pleased that as a consequence of great effort by our troops -- but also as a consequence of a shift in allegiances among the Sunni tribal leaders as well as the decision of the Sadr militias to stand down -- that we've seen a quelling of violence," he said.

But, Obama said, a functioning Iraq ultimately will depend on the capacity of the Iraqi people to unify themselves, get beyond sectarian divisions and set up a government that works for the people.

"There is security progress. Now we need a political solution," he said. Watch Obama describe his plan for Iraq »

Obama's stop in Jordan is the latest on his trip through the Middle East. So far, Obama also has been through Kuwait, Afghanistan and Iraq. The senator from Illinois will visit Israel before embarking on the European leg of his trip, which will take him through Germany, France and the United Kingdom. See the stops on Obama's trip »

Back in the United States, Sen. John McCain, the presumptive Republican nominee, has been criticizing Obama for his opposition to the surge, which began in 2007 when President Bush ordered nearly 30,000 additional troops to Iraq as part of a campaign to secure Baghdad and its surrounding provinces.

"He railed against it. He voted against the surge, and he said it would fail," McCain told CBS. "He was wrong there, and there's very little doubt in my mind that he will see for himself that he had a gross misjudgment and he will correct that."

The McCain campaign continued its criticism in a statement released after Obama's news conference in Jordan.