If Biden and his big donors are relying on polls for their success they are playing roulette.
I think GOP has a few odd choices for his convention so far, but, he also had some very good ones. Stick with the positive message. Even a man coming from Cuba who is crying about he horrors he left is a positive message, it's a reminder of what you DON'T want to become.
Some of the rabid speakers, yelling hyperbole and spewing fear is not helpful to him. Trump is usually his best speaker and he's often been balancing his message, throws in some humour, reached out to the common person who wants to win. He also repeats "China" a great deal which everytime he focuses on them it has to have the old Establishment worried about the Dems chances.
When even former CIA head Pompeo is telling us, we have better listen. Canada has already fallen behind on civil liberties and individual freedom, losing our best talent in the process. Becoming more influenced by China would make it far worse. Ditto for all Western nations. I think citizens get it now.