There would never be one encounter that didn’t consist of anything except trying to divide the two presidents. To this end, even VPs are best being quiet and unoccupied as much as possible. Thankfully, it would take a constitutional amendment, so it isn’t going to happen.
The two are in harmony, so there’s no division, no splitting of the two.
DeSantis is still called VP, so there’s no constitutional issue. DeSantis understands he’s the heir apparent.
What do they disagree about ? Virtually nothing. There could be the kind of compromises I applaud, between the two. Then, at that point, house and senate leaders become involved....maybe McCarthy and McConnell, but not certainly either of those if we’re talking 3-4 years hence.