At the very least it would force them to provide some response to the question, and it's framed from the point of view of trust - something Republicans are awful at.
What I mean by that is, their strategy has been "look at what those Democrats are doing" and then lying about what it is the Democrats are doing. It has never _been_ about trusting their Responding leadership, it has always been about _not_ trusting the other guy.
So that question actually drives down directly to a core value point that completely eludes the Republicans, one they know they lose every time, and therefore that's why they are always doing the other thing.