[Dr. Franklin]

But in this situation he is NOT the presiding officer in the Senate. He is the presiding officer of the Joint Session, and does NOT go into session with the Senate.

By tradition, VPOTUS may choose to not preside over a break out session in the Senate on rejecting or affirming a slate of electors, but that doesn't mean he doesn't have the right to do so. U.S. Constitution, Article I, Sec. 3, Clause 4:
The Vice President of the United States shall be President of the Senate, but shall have no Vote, unless they be equally divided.
The only time that VPOTUS cannot preside over the Senate is for an impeachment trial of POTUS, as he could have a conflict of interest.

[mrsmith]

BTW.
Though I’m disappointed in your refusal to even try to defend your blatantly false position here...

I want to tell you you’re in the right place to discuss the Constitution.
Welcome to Free Republic!