She has had a hairdresser spend a good hour on that hairdo, that would explain lack of hat.That said it doesn't mean its not a code. Considering she is not supposed to meet Trump tomorrow then why did she have her hair done today.

Why would she be meeting the president twice in a few months, which other president has had the honour (does she really like him?) and why him and no other leader. Sure he is at the UK NATO summit on Wednesday but so are they all.