Washington - A leading Republican senator and prospective presidential candidate said Sunday that the war in Iraq has destabilized the Middle East and is looking more like the Vietnam conflict from a generation ago.

Nebraska Sen. Chuck Hagel, who received two Purple Hearts and other military honors for his service in Vietnam, reiterated his position that the U.S. needs to develop a strategy to leave Iraq.

Hagel scoffed at the idea that U.S. troops could be in Iraq four years from now at levels above 100,000, a contingency for which the Pentagon is preparing.

"We should start figuring out how we get out of there," Hagel said on "This Week" on ABC. "But with this understanding: We cannot leave a vacuum that further destabilizes the Middle East. I think our involvement there has destabilized the Middle East. And the longer we stay there, I think the further destabilization will occur."

Hagel said "stay the course" is not a policy. "By any standard, when you analyze 2 1/2 years in Iraq ... we're not winning," he said.

President Bush was preparing for separate speeches this week to reaffirm his plan to help Iraq train its security forces while its leaders build a democratic government. In his weekly Saturday radio address, Bush said the fighting there protected Americans at home.

Polls show the public growing more skeptical about Bush's handling of the war.

Other Republican senators appearing on Sunday news shows advocated remaining  in Iraq until the mission set by Bush is completed, but they also noted that the public is becoming more and more concerned and needs to be reassured.

Sen. George Allen, R-Va., another possible candidate for president in 2008, disagreed that the U.S. is losing in Iraq. He said a constitution guaranteeing basic freedoms would provide a rallying point for Iraqis.

"I think this is a very crucial time for the future of Iraq," said Allen, also on ABC. "The terrorists don't have anything to win the hearts and minds of the people of Iraq. All they care to do is disrupt."

Hagel, who was among those who advocated sending two to three times as many troops to Iraq when the war began in March 2003, said a stronger military presence by the U.S. is not the solution today.

"We're past that stage now because now we are locked into a bogged-down problem not unsimilar, dissimilar to where we were in Vietnam," Hagel said. "The longer we stay, the more problems we're going to have."

Commentary:
Bush claims that anyone who disagree's with his war in Iraq wants the US to lose the war on terror. Does this include GOP leaders in the Senate also?