Who will replace Flynn? Robert Harward, Keith Kellogg, David Petraeus top the list

White House officials have put out out three names for the successor to National Security Adviser Michael Flynn, who resigned Monday night.

Robert Harward

Harward is a former deputy commander of U.S. Central Command and is considered the favorite for the job.

Upside: He's a protégé of Defense Secretary Jim Mattis with good connections to the military.

Downside: Trump doesn't know him very well.

Keith Kellogg

Kellogg is the acting national security adviser.

Upside: The lieutenant general is already doing the job and has experience as chief of staff to Flynn's NSC; he's a close adviser to Trump.

Downside: He's 72 and may not want the full-time job.

David Petraeus

Petraeus is a retired general and former CIA director.

Upside: He has vast experience and is a former commander of U.S. forces in Afghanistan.

Downside: He resigned from the CIA and later pleaded guilty to a misdemeanor charge stemming from his disclosure of classified information to a biographer with whom he was having an affair.

Read more:

Full text of Michael Flynn's resignation letter

Trump begins search to replace Michael Flynn as questions mount