GamerMax73
Member
Could the Queen veto this move, to 'protect the kingdom'.
Technically - yes. She has the power to refuse royal consent on the final act of parliament that removes the UK from the EU.
In reality, the last time royal assent was refused was in ... 1708!
A president has been set and any attempts to do this would trigger a constitutional crises.
There is absolutely nothing any member of the monarch can do or say on this matter without making everything a whole lot worse than it already is.