I wouldn’t be surprised if they burned up a large portion of their ready-in-the-can fake polls leading up to the convention. If that’s the case, they won’t be able to fake as high a convention bounce as they normally do.
Let’s wait and see.
Of course, the “debate” is just around the corner and the rabid attack dog “moderators” might just keep President Trump tied up enough for Comrade Camalol to declare victory. Inturrupting him, contradicting him, etc. You know, the usual.
The last dead cat (no) bounce, I remember was John Kerry in 2004.