Trump has the facility to home in on unpleasant weaknesses in his opponent and bore in. He recently began to do so with Bill Clinton as a way to undermine Hilary. He tried it one day and stopped, which is hardly his modas operandi. I can, however, imagine a scenario where Bill sent a message, containing two words," Felix Sater" to the Donald. This would remind Trump of his involvement with Mafia controlled companies that might not paint a pretty picture thereby proving the old adage about brick throwing from glass Trump towers.