That is a typical Trump deal.
It gives nothing but what he has unlawfully taken away. At the moment he has taken hostage two groups of innocents, about whom he cares nothing. He's saying he may release them both for a while if he gets a wall.
It's designed to cause embarrassment. In fact, it will make him look like he is. And Pelosi can't back down because at issue is the separation of powers.
If the GOP wanted a wall, they had two years in which to fund it.