President Donald Trump said his administration was investigating the addition of a journalist to a text group of top officials discussing plans for military strikes in Yemen, but expressed support for national security adviser Michael Waltz.

President Donald Trump said Tuesday that Signal, the app in which his top national security officials discussed war plans in a text group that included a journalist, was "the best technology for the moment." Newsweek reached out to the Department of Defense via email for comment.

Donald Trump has given a baffling response to the major intelligence security failure that saw the US' war plans accidentally leaked to a reporter, after he was added to a group chat on the app Signal