His guest Dana Perino seems to think it won't be her. She also thinks it would be a bad choice, but I am not sure I agree with that, especially if you compare them to the other supposed main contenders. Rice seems more credible as a person to me than Harris and Bass, though she's hurt by her association with the Obama administration though I don't know how significant of a factor that will be given the fact that Biden being Obama's VP already makes his presidential campaign associated with the previous president, anyway.Tucker did talk about Susan Rice later in the show, but not in that segment.
I hope he picks either Harris or Bass, and not Rice. People think Harris has already been picked, but that "accidentally" posted Politico article could be A/B testing. I remember Biden saying that he would announce his pick on August 1st, but later he implied that it would be a little bit later, so perhaps they are testing the waters to see what the reaction to Harris is among the Bernie crowd and independent voters.