This is tantamount to Trump saying “Sorry guys. I was bluffing. I got nothing!”
$5 million dollars is NOTHING to either of these 2. Obama could donate $5 mil to charity himself and never miss it and not have to release his transcripts.
If Trump really wanted to put the pressure on Obama, he should have upped the ante to something like $100 million. That would have really put the pressure on him.
It is also possible that rather than interfere with the Benghazi email blow-up, he decided to temporarily shelve what he has and replace it with a smoke screen like this.