I suspect that the Republicans, in their multiple efforts to offend just about everybody, has begun to change how people vote. Its very strange. When Trump first came on the scene he spent a lot of his time offending just about anybody there was. This was construed, by many, as telling the truth (they still believe). Others were so offended by both sides they stopped voting. Many others changed their voting habits.
The entire thing continues to develop and that development has changed things and nobody really knows what the hell is going on. I do know, however, that things are changing all the time at a very high clip.