Republican presidential front-runner Donald Trump acknowledged on Tuesday he does not yet have a foreign policy team, and three former U.S. military and intelligence officials who have endorsed him are little known in either the Republican Party or the wider foreign policy community.

The New York billionaire, who had promised to name his foreign policy and national security advisers last month, told MSNBC that he has met with people but made no decision yet on who to advise him on global affairs.

Asked whether he had a team, Trump said on Tuesday: "Yes, there is a team. Well, there's not a team. I'm going to be forming a team at the appropriate time. I've met with far more than three people."