President Obama's choices for his national security team could help him consolidate some of the signature policies he developed in his first term, from his strategy for ending the war in Afghanistan to his dependence on drone strikes in the fight against al-Qaida.
They will raise important questions about others, including his stated determination to prevent Iran's acquisition of a nuclear weapon by military means if necessary.
Consequently, the confirmation hearings of Chuck Hagel for the Defense Department, John Brennan for CIA director and John F. Kerry for the State Department could provide a needed debate on the direction of U.S. national security policy - provided that senators can avoid distractions.
Chief among the distractions would be charges that Mr. Hagel, a former Republican senator from Nebraska, is hostile to Israel or even anti-Semitic. There is no serious evidence to support either allegation.
Certainly Mr. Hagel's views about the Middle East have often been outside the mainstream - except on the Iraq war, where he was anything but the savant that the White House describes. (Having voted to authorize the invasion in 2002, Hagel denounced the 2007 surge as "the biggest foreign policy blunder since Vietnam.")
But there's no reason to believe Hagel would not, as Pentagon chief, continue the close military cooperation with Israel maintained by predecessors Leon Panetta and Robert Gates - who were also publicly critical of Israeli policies at times.
The real issues raised by Hagel's nomination are his past support for a quick-as-possible withdrawal from Afghanistan, a further downsizing of what he described as a "bloated" Pentagon and his resistance to foreign interventions.
To a large degree, these views are shared by Mr. Kerry, a fellow Vietnam veteran, and coincide with Obama's plans for his second term. So the Senate ought to explore and debate their potential benefits and risks.