‘The Senate has not spoken on a Sessions ‘replacement’.’
Yes they have.
But ignorance is bliss, so they say.
How is it possible for the Senate to speak on a position that has no nominee? If Sessions is fired or resigns President will nominate a replacement. Then the Senate can do its thing whatever that might be. Nothing is cut in stone. Until the Senate confirms or denies a replacement, there would be an ‘acting’ Attorney General.