The focus is on Trump but the story stems from leakers who violated their secrecy oaths and disclosed classified confidential information.  I find that extremely funny.  I hope they find the leakers and fire them.  As President, Trump certainly has the right to warn any country about the threat of attacks on civilian airliners via notebook computer bombs.  Frankly, this has been an obvious means of attack forever.  The battery packs can be replaced with explosives and show up the same as batteries on X-ray.  This has been obvious to us techs for years.  The reason planes have not been brought down is that almost nobody in the world wants to take planes down and, in fact, the massive airport security is a sham because obvious means of bringing planes down is not protected against.  It is only the lack of desire to bring planes down that protects us.