Sorry, but I disagree. There is no consensus whatsoever in the EU about a federal Union. There is not even consensus on a budgetary union (as in shared debt, not just having a shared currency) because it will reflect badly on states that currently have stronger economies in the EU: https://www.reuters.com/article/germany-lithuania/merkel-say...
Actually, to be fair, every time there was a popular referendum even the EU Constitution has been rejected by the population (it only passed later by the parliament): https://en.wikipedia.org/wiki/2005_French_European_Constitut... https://en.wikipedia.org/wiki/2005_Dutch_European_Constituti...