Richard Armitage, the Deputy Secretary of State in Bush’s first term, told me that he believed the Democratic election victory, followed by Rumsfeld’s dismissal, meant that the Administration “has backed off,” in terms of the pace of its planning for a military campaign against Iran. Gates and other decision-makers would now have more time to push for a diplomatic solution in Iran and deal with other, arguably more immediate issues. “Iraq is as bad as it looks, and Afghanistan is worse than it looks,” Armitage said. “A year ago, the Taliban were fighting us in units of eight to twelve, and now they’re sometimes in company-size, and even larger.” Bombing Iran and expecting the Iranian public “to rise up” and overthrow the government, as some in the White House believe, Armitage added, “is a fool’s errand.”

“Iraq is the disaster we have to get rid of, and Iran is the disaster we have to avoid,” Joseph Cirincione, the vice-president for national security at the liberal Center for American Progress, said. “Gates will be in favor of talking to Iran and listening to the advice of the Joint Chiefs of Staff, but the neoconservatives are still there”—in the White House—“and still believe that chaos would be a small price for getting rid of the threat. The danger is that Gates could be the new Colin Powell—the one who opposes the policy but ends up briefing the Congress and publicly supporting it.”

Other sources close to the Bush family said that the machinations behind Rumsfeld’s resignation and the Gates nomination were complex, and the seeming triumph of the Old Guard may be illusory. The former senior intelligence official, who once worked closely with Gates and with the President’s father, said that Bush and his immediate advisers in the White House understood by mid-October that Rumsfeld would have to resign if the result of the midterm election was a resounding defeat. Rumsfeld was involved in conversations about the timing of his departure with Cheney, Gates, and the President before the election, the former senior intelligence official said. Critics who asked why Rumsfeld wasn’t fired earlier, a move that might have given the Republicans a boost, were missing the point. “A week before the election, the Republicans were saying that a Democratic victory was the seed of American retreat, and now Bush and Cheney are going to change their national-security policies?” the former senior intelligence official said. “Cheney knew this was coming. Dropping Rummy after the election looked like a conciliatory move—‘You’re right, Democrats. We got a new guy and we’re looking at all the options. Nothing is ruled out.’ ” But the conciliatory gesture would not be accompanied by a significant change in policy; instead, the White House saw Gates as someone who would have the credibility to help it stay the course on Iran and Iraq. Gates would also be an asset before Congress. If the Administration needed to make the case that Iran’s weapons program posed an imminent threat, Gates would be a better advocate than someone who had been associated with the flawed intelligence about Iraq. The former official said, “He’s not the guy who told us there were weapons of mass destruction in Iraq, and he’ll be taken seriously by Congress.”

Once Gates is installed at the Pentagon, he will have to contend with Iran, Iraq, Afghanistan, the Rumsfeld legacy—and Dick Cheney. A former senior Bush Administration official, who has also worked with Gates, told me that Gates was well aware of the difficulties of his new job. He added that Gates would not simply endorse the Administration’s policies and say, “with a flag waving, ‘Go, go’ ”—especially at the cost of his own reputation. “He does not want to see thirty-five years of government service go out the window,” the former official said. However, on the question of whether Gates would actively stand up to Cheney, the former official said, after a pause, “I don’t know.”

Another critical issue for Gates will be the Pentagon’s expanding effort to conduct clandestine and covert intelligence missions overseas. Such activity has traditionally been the C.I.A.’s responsibility, but, as the result of a systematic push by Rumsfeld, military covert actions have been substantially increased. In the past six months, Israel and the United States have also been working together in support of a Kurdish resistance group known as the Party for Free Life in Kurdistan. The group has been conducting clandestine cross-border forays into Iran, I was told by a government consultant with close ties to the Pentagon civilian leadership, as “part of an effort to explore alternative means of applying pressure on Iran.” (The Pentagon has established covert relationships with Kurdish, Azeri, and Baluchi tribesmen, and has encouraged their efforts to undermine the regime’s authority in northern and southeastern Iran.) The government consultant said that Israel is giving the Kurdish group “equipment and training.” The group has also been given “a list of targets inside Iran of interest to the U.S.” (An Israeli government spokesman denied that Israel was involved.)

Such activities, if they are considered military rather than intelligence operations, do not require congressional briefings. For a similar C.I.A. operation, the President would, by law, have to issue a formal finding that the mission was necessary, and the Administration would have to brief the senior leadership of the House and the Senate. The lack of such consultation annoyed some Democrats in Congress. This fall, I was told, Representative David Obey, of Wisconsin, the ranking Democrat on the House Appropriations subcommittee that finances classified military activity, pointedly asked, during a closed meeting of House and Senate members, whether “anyone has been briefing on the Administration’s plan for military activity in Iran.” The answer was no. (A spokesman for Obey confirmed this account.)