Tulsi Gabbard - a former Democratic congresswoman who joined the Republican Party to back Donald Trump - is the president-elect's pick for director of national intelligence.
The wide-ranging role would mean she oversees US intelligence agencies like the CIA, FBI and the National Security Agency (NSA), which focuses on intelligence gathering.
The nomination has raised questions over Gabbard's lack of experience in intelligence as well as accusations that she has in the past amplified Russia propaganda.
She will require Senate confirmation to take up the role.