Pretty much anything official will require the president's signature, not the VP's. Cheney had power because Bush really trusted him on foreign policy so would do what Cheney recommended. I don't know Harris' situation. President's always want to stress the VP is active and involved, but it isn't always true. I don't know how much power Harris really has, but one can assume whatever power she has is to carry out what Biden wants done. I don't believe for a moment she wanted mass deportation, but does anyone think if she wanted mass deportation Biden would sign off on it?