I have to keep going through this again and again: "The Republican convention was particularly important. It took Bush from a double-digit deficit at the beginning of August to a narrow lead at the end of that month. After that, Bush never lost the lead. This is something that conventional accounts of the Willie Horton ad rarely mention: Dukakis was already behind when the ad appeared." https://www.washingtonpost.com/news...-the-willie-horton-ad/?utm_term=.ff697e4f646f