I just returned from France - had a gig in Paris and the Provence tour of wineries - right now, France isn't too much different than the US was recently. Marching and protests all over the place. I don't just mean in Paris or the big cities either. In the little towns of Avignon, Limes, Carcassonne, Toulouse, etc.. there were parties marching with signs and protesting across from one another. Streets shut down etc...
She won't win. If she does, it won't matter because the FRexit won't happen and she has been on tv as saying that the is what 70% of her present and future agenda hinges upon.
It isn't like it was when I was in London when the BRexit vote was announced. France (and the other EU countries) will never have such an easy time of it like Britain has. Their conversion will be a nightmare if they go through with it.