US President Donald Trump will interview candidates for the position of national security adviser on Sunday.
He has selected four candidates: adviser Keith Kellogg; former UN ambassador John Bolton; Lt Gen H R McMaster; and Lt Gen Robert Caslen.
The role became vacant when Lt Gen Michael Flynn was fired after just three weeks and three days in the job.
Mr Trump's first choice, Retired Vice Admiral Robert Harward, turned down the role, citing family reasons.
Gen Flynn stepped down after misleading Vice-President Mike Pence over his conversations with Russia's ambassador to the US.Image copyright Reuters Image caption Retired Vice-Admiral Robert Harward is a 60-year-old former Navy Seal
When asked about speculation that he was not allowed to bring his own staff at the National Security Council, Mr Harward told the Associated Press: "I think that's for the president to address."
Retired general and former CIA chief David Petraeus is also no longer a candidate, Mr Trump's press secretary Sean Spicer said on Saturday.
Mr Petraeus retired as CIA director in 2012 after it emerged he had given top-secret material to his biographer, with whom he was also having an extramarital affair.
He is still serving two years' probation after his conviction for mishandling classified information, and would need to notify his parole officer if he wished to move to Washington DC.Image copyright Reuters Image caption David Petraeus (left) and Keith Kellogg (right)
Mr Kellogg, a retired three-star general who became a security consultant for software giant Oracle Corp, has been acting national security adviser for the past week.
'Many, many want the job'
President Trump deflected accusations that he was struggling to find a replacement for Gen Flynn, telling reporters on Air Force One on Saturday that he had "many, many that want the job".
The president is spending the weekend at his properties in Florida for the third week in a row. He has called his Florida Mar-a-Lago club the "Southern White House".Image copyright Reuters Image caption President Trump has used his Mar-a-Lago club to host foreign dignitaries