In the 2002 French presidential election, Jacques Chirac from the centre-right Rally for the Republic won with a large margin against Jean-Marie Le Pen of the National Front.
I have a suspicion that the National Front, if they reach the run-off election for the 2017 French presidential election, may have a better chance if they face a left wing opponent rather than a centre-right opponent. What does polling currently indicate the influence National Front's opponent has on how many people would vote for the National Front, vote for the National Front's opponent, or abstain from voting?