Want to know how Biden can own Trump on this? Put out a statement that reads, "To put this whole matter to rest I took the same cognitive assessment that the President took. I, too, aced the test. But unlike the President I didn't find it hard at all." Puts the ball back in Trump's court.
It won’t happen. President Trump set the narrative for that news cycle and has moved on to set a new narrative. Biden’s team is just not that good, IMO.