A Le Pen victory may not be the only problem the EU needs to worry about. Her possible election may lead to a French withdrawal from the Euro, which would speed up an end to the superbloc's existence, but there are other likely contenders. Economics may not have led to a Remain victory in Britain last year, but the economy still ultimately determines if these trading blocs will survive, not just politics.
A ticking time-bomb
The Euro, let alone the EU, is a ticking time-bomb of economic and political disasters waiting to happen. Wilders may have failed to win in Holland this month, but the anti-EU spirit could still triumph in other countries.
The political implications of last year's Italian referendum are still unclear. Fresh elections could enable a victory for the Five Star Movement, which wants to end their country's Euro membership.
Merkel may survive this year, but the AfK could easily reduce the number of seats she currently retains in the Bundestag and will gradually strengthen anti-establishment feeling there.
Economic uncertainty
But it is not just impeding elections that will help cause the superbloc to collapse. The economies of Greece, Italy and now Spain are facing a crisis. The Euro was never likely to survive without full integration between all the EU states. It is likely Germany may have to bail out these countries again and if that is the case, the single currency's collapse will only be delayed, not saved.
Not to mention that these countries are also facing the strain of the refugee crisis.
So the bets are on which country will cause the collapse of the EU, either politically or economically, before Brexit is due to be completed.