Miranda Devine: Mike Waltz’s Signal-gate blunder is a hard lesson to be learned for Trump’s winning team

National Security Adviser Mike Waltz says Atlantic editor-in-chief Jeffrey Goldberg could have been patched into sensitive group chat of Cabinet discussing military strikes against Houthis in Yemen .

Waltz has said he accepts “full responsibility” for the error and admitted he “built the [ Signal ] group’s] group.”.

The Democrats have no moral high ground in this case, but they have over-egged the pudding so much, they have destroyed their own credibility.

Trump ’s Middle East envoy did not participate in the group chat while he was in Russia , as has been claimed.

Signal is one of the most secure messaging apps in the world, it uses end-to-end encryption.