Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Pentagon in its Longest-ever Stretch of Leadership Limbo Associated Press WASHINGTON - When he resigned as defense secretary last December, Jim Mattis thought it might take two months to install a successor. That seemed terribly long at the time. Seven months later, the U.S. still has no confirmed defense chief even with the nation facing potential armed conflict with Iran. That's the longest such stretch in Pentagon history. There is also no confirmed deputy defense secretary, and other significant senior civilian and military Pentagon positions are in limbo, more than at any recent time. The causes are varied, but this leadership vacuum has nonetheless begun to make members of Congress and others uneasy, creating a sense that something is amiss in a critical arm of the government at a time of global uncertainty. William Cohen, a former Republican senator who served as defense secretary during President Bill Clinton's second term, says U.S. allies -- "and even our foes" -- expect more stability than this within the U.S. defense establishment. "It is needlessly disruptive to have a leadership vacuum for so long at the Department of Defense as the department prepares for its third acting secretary in less than a year," Cohen told The Associated Press. He said he worries about the cumulative effect of moving from one acting secretary to another while other key positions lack permanent officials. "There will inevitably be increasing uncertainty regarding which officials have which authority, which undermines the very principle of civilian control of the military," Cohen said. "In addition, other countries -- both allies and adversaries -- will have considerable doubt about the authority granted to an acting secretary of defense both because of the uncertainty of confirmation as well as the worry that even being a confirmed official does not seem to come with the needed sense of permanence or job security in this administration." Key members of Congress are concerned, too. "We need Senate-confirmed leadership at the Pentagon, and quickly," Sen. Jim Inhofe, an Oklahoma Republican who heads the Armed Services Committee, said Thursday. The panel's ranking Democrat, Sen. Jack Reed of Rhode Island, said the vacancy problem has created "disarray" in the government's largest bureaucracy. It started with Mattis, who quit in December after a series of policy disputes with President Donald Trump that culminated in his protest of administration plans to pull troops out of Syria as they battled remnants of the Islamic State. At least outwardly, the Pentagon has managed to stay on track during this churn, and senior officials caution against concluding that the military has been harmed.