The last time Robert Malley went to work for the White House, it was as a Middle East peacemaker, advising President Bill Clinton during his futile effort to broker an agreement between the Israelis and the Palestinians at Camp David in 2000.

Now, Mr. Malley is coming back to the White House, administration officials said on Tuesday. This time, he will manage the fraying ties between the United States and its allies in the Persian Gulf, a job that says a lot about how America’s role in the Middle East has changed.

As a senior director at the National Security Council, Mr. Malley will help devise American policy from Saudi Arabia to Iran. It is a region on edge, with the Saudis and their Sunni neighbors in the gulf fearful that the United States is tilting away, after decades of close ties with them, toward a nuclear accommodation with Shiite Iran.

With his many contacts throughout the Arab world, Mr. Malley, who has been program director for the Middle East and North Africa at the International Crisis Group, would seem well suited for such a post. But he has also been something of a lightning rod in a field that can be culturally and ideologically treacherous.

In 2008, Mr. Malley was forced to sever his ties as an informal adviser to the campaign of Barack Obama when it was reported that he had met with members of Hamas, the militant Palestinian group, which the State Department classifies as a terrorist organization. 

The meeting, Mr. Malley said in a letter to The New York Times, was hardly a secret and came in the course of his work with the I.C.G., a nonprofit group focused on preventing conflict. Still, he felt obliged to distance himself from Mr. Obama to avoid misperceptions of the “candidate’s position regarding the Islamist movement.Read the rest here.