European Commission president Jean-Claude Juncker recently begged EU leaders not to hold votes on whether to leave the EU ... because they may PASS:

Regarding referenda on EU membership, I think it is not wise to organize this kind of debate, not only because I might be concerned about the final result but because this will pile more controversy onto the huge number already present at the heart of the EU.

(starting around 4:00)

He's right to be worried ...