He is so transparently desperate to put Haley in the rear-view mirror.
And he's already told us what he's going to do to get out of debating with Biden: He's going to insist that none of the traditional debates be held and instead they all must be Trump campaign events hosted by his sycophants rather than independently run debates. When he doesn't get his way he's going claim Biden didn't want to debate him.
This is how stupid Fox News knows their audience to be.