Even though Trump just lies and everyone knows he lies, he does sell people what feels like a kind of political agency. ‘You want a good economy? - I’ll give you a good economy. You want no war? - I’ll give you no war,’ etc. Whereas Biden takes a ‘don’t even worry about it, the adults are in the room, we’re sorting it out, and lucky for you’ kind of approach. That approach doesn’t work if you wheel out a bumbling incoherent old man as it’s representative, on the contrary it’ll make a lot of people very nervous. Trump really picked up on this too when he said that Biden was sleepwalking everyone toward WW3. I think Biden is done for.