[Dr. Franklin]

No. As the ranking federal official at the Capitol Pence would have that authority.

Considering that Trump is at the White House, I don't think so. Considering that Trump and Pence don't appear to be talking, I don't think so. The problem is, that if they don't know where Congress is, Trump can't give his response. Pelosi was discussing the 25th Amendment right before the election for a reason.

[ought-six]

That’s just it: Even if Trump were at the WH Pence would still have authority to call out the NG to the Capitol if he were at the Capitol. Pelosi would have the authority if she were the highest federal official on site at the Capitol.