WASHINGTON (AP) - Crusty and unapologetic, Donald H. Rumsfeld is the public face of an unpopular war and a target of unrelenting criticism. A growing number of commanders who served under him say he has botched the Iraq operation, ignored the advice of his generals and should be replaced.

WASHINGTON (AP) - Crusty and unapologetic, Donald H. Rumsfeld is the public face of an unpopular war and a target of unrelenting criticism. A growing number of commanders who served under him say he has botched the Iraq operation, ignored the advice of his generals and should be replaced.

The White House insists the defense secretary retains President Bush's confidence. Few close to the administration expect him to be shown the door.

"The president believes Secretary Rumsfeld is doing a very fine job during a challenging period in our nation's history," Bush spokesman Scott McClellan said yesterday as the administration circled its wagons around the embattled Pentagon chief.

Two more retired generals called for Rumsfeld's resignation on Thursday, bringing the number this month to six.

Retired Army Major Gen. John Riggs told National Public Radio that Rumsfeld fostered an "atmosphere of arrogance." Retired Gen. Charles Swannack told CNN that Rumsfeld micromanaged the war. "We need a new secretary of defense," he said.

Military experts say the parade of recently retired military brass calling for Rumsfeld's resignation is troubling and threatens to undermine strong support Bush has enjoyed among the officer corps and troops.

With public anti-war sentiment increasing, "the president and his team cannot afford to lose that support," said Kurt Campbell, a former deputy assistant secretary of defense.

Yet for Bush to try to distance himself from Rumsfeld "would call into question everything about the last three years' strategy in ways the White House worries would send a very negative message," said Campbell, now with the Center for Strategic and International Studies.

Joining the criticism earlier this week was retired Army Maj. Gen. John Batiste, who served as an infantry division commander in Iraq until last November. He called for a "fresh start at the Pentagon," accusing Rumsfeld of ignoring sound military decision-making and seeking to intimidate those in uniform.

Earlier calls for Rumsfeld's replacement came from retired Marine Gen. Anthony Zinni, retired Marine Lt. Gen. Gregory Newbold and retired Army Maj. Gen. Paul Eaton.

The most nettlesome member of Bush's Cabinet, Rumsfeld has been a lightning rod since the war began in March 2003.

He was blamed for committing too few U.S. troops and for underestimating the strength of the insurgency. He took heat in 2004 over the abuse of Iraqi prisoners at the U.S. Army-run Abu Ghraib prison, and for a brusque response he gave to an Army National Guard soldier in Kuwait who questioned him on inadequate armor.

Republicans in Congress have offered Rumsfeld little in the way of public support.

Pentagon spokesman Eric Ruff said yesterday that Rumsfeld has not talked to the White House about resigning - and is not considering it.

As to the latest general to call for Rumsfeld's resignation, "I don't know how many generals there are. There are a couple thousand at least, and they're going to have opinions," Ruff said. "It's not surprising, we're in a war."

But it is surprising, especially because it's a time of war, said P.J. Crowley, a retired Air Force colonel who served as a Pentagon spokesman in both Republican and Democratic administrations and was a national security aide to former President Clinton.