5 years from now, France's economy will be doing a lot better; there will be more jobs and youth employment will rise to normal levels. France's place within the EU will be elevated once again to parity with Germany. The refugee crisis and the Eurozone debt crisis will be distant memories. Brexit will be a disaster, and a clear warning that isolationist, xenophobic politics is simply not an option: open, liberal politics is the only route to prosperity. As France's outlook improves, FN's voter base will diminish, and En Marche (or its successor) will continue to do well.
Calling it now.
This so naive! (Neo)Liberal politics is the reason the EU and the West is in such a mess in the first place. Wishful thinking! Lol.