Spicer said that former CIA chief David Petraeus was no longer a candidate for the post, however, could not say whether former Army Chief of Staff Gen. Ray Odierno was still a candidate.
On Monday night, Flynn resigned as US national security adviser after media reported based on leaked information that he had misled Trump administration officials about the extent of his talks with Russian Ambassador to the United States Sergey Kislyak on the issue of anti-Russia sanctions.
Flynn did not concede any wrongdoing in his resignation letter, saying that he inadvertently briefed Vice President Mike Pence and others with incomplete information regarding his phone calls with the Russian ambassador.
Never miss a story again — sign up to our Telegram channel and we'll keep you up to speed!