The Washington Post's crack team of Peter Baker and Dafna Linzer report that John Bolton, George W. Bush's nominee for UN Ambassador, might not be quite the diplomat some think he is.

For years, a key U.S. program intended to keep Russian nuclear fuel out of terrorist hands has been frozen by an arcane legal dispute. As undersecretary of state, John R. Bolton was charged with fixing the problem, but critics complained he was the roadblock.

Now with Bolton no longer in the job, U.S. negotiators report a breakthrough with the Russians and predict a resolution will be sealed by President Bush and Russian President Vladimir Putin at an international summit in Scotland next month, clearing the way to eliminate enough plutonium to fuel 8,000 nuclear bombs.

The prospective revival of the plutonium disposal project underlines a noticeable change since Bolton's departure from his old job as arms control chief. Regardless of whether the Senate confirms him as U.N. ambassador during a scheduled vote today, fellow U.S. officials and independent analysts said his absence has already been felt at the State Department.

Without the hard-charging Bolton around, the Bush administration not only has moved to reconcile with Russia over nuclear threat reduction but also has dropped its campaign to oust the chief of the International Atomic Energy Agency (IAEA) and made common cause with European allies in offering incentives to Iran to persuade it to drop any ambitions for nuclear weapons.

In a circuitous way, maybe the Bolton nomination will improve America's foreign relations.