Thank you for admitting its a problem affecting his election chances.That isn't what you are arguing though.
You are saying "THIS is what is costing him the election".
That is saying it is - if not nothing else - the primary reason.
Yet you've never managed to provide evidence for that.
...
I've never said it was just you.
Or that it wasn't a problem that was affecting his election chances.
That is what I'm arguing.